Man, that era of Polyhedron was great! Pulp Heroes, Iron Lords of Jupiter, Thunderball Rally and Hi-Jinx were my favorite.
That team was really pushing the d20 envelope as far as it could go, and I really miss it. The combination of high production values and the wild, experimental spirit -- along with the brevity of the magazine format -- made for some really great stuff.
I was sad when the mini-games stopped, but at the same time, the quality of Dungeon went up across the board. Really -- and this is IMO of course -- I think that Dungeon Magazine during the 3.0 - 3.5 era will go down as one of the most fondly remembered RPG magazine eras, along with pre-Warhammer White Dwarf in the 80s.
In an issue of Dungeon you would get one or two great maps (the Map of Mystery and maybe a two-page "Forgotten Realms" specific maps that could be easily placed in any fantasy campaign), adventures for an era of D&D when building encounters and balancing monsters had become a little more time consuming, and usually several pieces of great art that you could use to represent a monster, npc or anything else.
I think it was Dungeon (might have been Dragon, I'm not sure) which had the cool comic "Downer" which I still need to buy in a collected format.
With the new John Carter movie coming out, I think I'll dig out Iron Lords again.
The person (I assume, person) who wrote ILoJ -- Lizard -- also wrote a cool GURPS mini-supplement called Tales of the Solar Patrol.
Pathfinder isn't really my thing right now, but I love how these guys are continuing to succeed. I predict -- perhaps with foolish hope -- that we'll see them branch out again. Maybe a new publication of mini-games?