(With gratitude to William and Maudlin)
Here is a link that if you follow, you can bring up closeup maps of various parts of the Flanaess, or a closeup of the entire Flanaess. Recommended:
http://www.sodabob.com/roleplay/dnd/Maps/
Here is the overview map of the Flanaess, with many of the names:
http://www.sodabob.com/roleplay/dnd/Maps/completeflanaess.gif
Here is a large-scale map of the Flanaess and adjacent areas. No names are on this map:
http://www.geocities.com/TimesSquare/5878/gridgeo.gif
Here is an even larger scale map that shows the whole continent of Oerik, with the Flanaess and Hempmonaland at the eastern end. The names of many off-Flanaess countries are on this map.
http://members.aol.com/cathbhadhx/tsroerth.gif
Here's another large scale map:
http://www.sodabob.com/roleplay/dnd/Maps/oerthlarge.gif
Here are map links for Greyhawk from William's Map and Other Campaign Resources Post (the one with the sticky) at the top of the Talking the Talk messageboard. (thumbs up, William!

)
http://www.geocities.com/TimesSquare/5878/wogmaps.html
Greyhawk Maps:
http://www.thewatchman.de/spidersweb/oerik.htm
Oerth and Greyhawk maps:
http://www.sodabob.com/roleplay/Campaigns/GreyhawkMaps/
Oerth map:
http://members.aol.com/cathbhadhx/tsroerth.gif
Oerik Continent:
http://www.highprogrammer.com/alan/...p/supermap.html
World of Greyhawk Map:
http://www.arrantdestiny.com/maps.htm
Greyhawk Maps:
http://www.geocities.com/TimesSquare/5878/wogmaps.html
(One shows latitude.)
Living Greyhawk Maps:
http://ca.geocities.com/kanisl/
World of Greyhawk Maps:
http://talmeta.net/maps/wog.htm
I would recommend you peruse that thread. There's a lot of good stuff in there, and William has done an excellent job of sorting it out.
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Here is one of Maudlin's (cheers, Maudlin!

) map from the 3rd IR. It is the only map of his I can still access, unfortunately:
http://users.pandora.be/maudlin/Greyhawk.jpg
From this, you can see a couple of things:
1: A map is vital for the IR. Serpenteye is right on that. And I do not know how to create maps at all, much less duplicate what Maudlin did.
2: Maudlin's work was (and is) beautiful, as you can see. The 3rd IR wouldn't have been half of what it was without him. But I cannot contact Maudlin. I haven't heard from him in years. And I don't know anyone who can duplicate what Maudlin did.
3: The map shows changes in the geography of the Flanaess. That's because we seriously messed up the geography of the Flanaess. And I'm sure we could have messed it up a lot more, given a bit more time.
4: We added a LOT of powers to the Flanaess that did not previously exist. In addition, countries off-map are referred to by arrows on the fringes of the map. And note the circle areas that depict Underdark and underwater nations. (Mountains, forests and rivers are on the map, but shaded according to whoever held them.)
5: It's up to Serpenteye whether any of those new nations are used. For example: the Deepwater League (merfolk/triton nation), the Solistarim, Aerlindre (sky elven nation), Kinemeet (one of the Bandit Cities turned into a nation, along with Kor, Redhand, Artonsay, Riftcrag, and Fellands), Chauntosbergen (good aligned dwarven nation), Delrune (high elven nation), Heisenbaudos (frost giant nation), Usurbaudos (hill giant nation), Grannmont (storm giant/aarocroka nation), the Spirit Empire of Garnak (a powerful baklunish nation with powerful nature and good undead allies), Calrune (a centaur nation ), Varnaith (off-map equatorial elven empire), the Quaggoth Tribal Confederation of the Burneal Forest, and others.
A few of the new nations were solely the creation of the players. For example: The Hive Cluster (run by Forsaken One) is one of these.
6: As you can see from the map - and things had GREATLY sorted themselves out by the time this particular map was made!!! - the powers of the IR were all jumbled together in a confusing welter. Everyone was right there in everyone else's face, far far too close for comfort. Some players opted for one big territory for their protection. Some opted for many small enclaves, so if one was destroyed the others survived. And some weren't on the map at all: the Black Brotherhood being a notable case (nothing like out of sight, out of mind.)
Some players were content with what they had, and just watched events. Some (like William) negotiated furiously and made alliances, creating the good aligned Alliance of Oerth. Some played off the various sides against each other (let's you and him fight. Heh, that was you, Gnomeworks.) One attempted to create a kind of Dark Byzantium, forsaking combat but keeping force ready (cheers to you, John Brown) Some went ballistic from the word Go (hey there, Melkor!) And some connived and schemed and plotted, and threatened, and attacked, then plotted some more (look at how BIG Serpenteye and Mr. Draco's Empire of Aerdi - it became the nasty Union of Oerth - got!) And two (Forrester, Anabstercorian) threatened Oerth from Wildspace as well as from the ground. (My salutes to all in the 3rd IR!

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And that was before things got truly wild (don't ask, unless you have a very strong stomach. You'll find out soon enough, if Serpenteye takes this IR anywhere close to what happened in the 3rd IR.

)