Taelorn76 said:
Does anyone kow if these books will be revised as well. I would hate to spend my money on them only to find out that they are being rereleased in a few months.
I doubt it very much.
As mentioned above, 3.0 to 3.5 conversions are not too difficult when even necessary.
The creature collection (CC1) was the very first third party book to carry the d20 logo - It was released even before the 3.0 monster manual. It had a lot of technical errors. That was one BIG reason for the revision. Another was that they sold out of this book, and figured they may as well fix the errors and update it for the already announced 3.5 version of the game.
As far as I know ( and I pay attention to the subject ), no other revisions for this line have been announced
edit:
The SLCS ( Ghelspad) is NOT 3.5, but it is mostly flavor anyway so it shouldn't matter to you.
If you are looking for a place to start that contains details for a city your PC's could use as a base of operation, consider going with Mithril. This city is a little more conventional than the necromantic ruled city of Hallowfaust, the vice ridden city of Shelzar, or the underground city of the Dwarves, Burok Torn. You can explore these places later if they interest you. From the published material so far, you definitely notice that there is a heavy emphasis on Eastern Ghelspad, so if you are the type of DM that likes a lot of available setting books to reference, again, I would reccomend basing a campaign there.
and since I'm on the subject of SL - I just got CC3 today - looks good so far on my initial flip through. Definitely more extra planar beings than I thought. Less focus on Termana than I thought...