how many slides will Keynote accept in a project

I think the answer is the highly specific and scientifically accurate term "Gobs and gobs"

There are people who have indicated they weere using 200 slides, and one a while back who mentioned over 400.

I think the real answer would lie on your hard drive space and battery poweer during a presentation. If you are worried about working with a hugemongous file, then you can do the work in sections and join everything together into the main file at the end.

I cant' find anything in the docs. But... if you use the SteveNote at MacWorld SF as any kind of guide, it looks like you can use zillions.

G5 iMac, iBook, 15ALBook Mac OS X (10.4.3)

I think I overheard someone say "bajillion" but I don't know if it was one bajillion or plural as in bajillions.

I'd imagine there is an upper limit that can probably be determined by taking a peek in the XML, so why don't I just do that?

Well, normally you just kinda plug in a string until you reach a point that the program doesn't like the length of the slide name, then work out permutations from there, but so far, I've given a slide the ID of "123456789012345678901234567890123456789012345678901234567
8901234567890123456789012345678901234567890123456789012345
6789012345678901234567890123456789012345678901234567890123
4567890123456789012345678901234567890123456789012345678901
2345678901234567890123456789012345678901234567890123456789
0123456789012345678901234567890123456789012345678901234567" and Keynote still opens it. Just dealing with numbers and not including letters, you'd just go 10x10x10x10 etc until you account for each number and you could have more slides than that.

Of course, as others have said, you'll hit a limit as far as memory, hard drive space and other factors are concerned, but, at least from a raw "How many different discrete names can I have for slides" it appears to be a very large set.

Wow. that number is, like... bigger than five.