Do you have ideas on better tools for designers? I do for programmers, but if designers are a bigger bottleneck it would be great if their tools could be improved too :)
If I'd have to give any hints, I'd stick with what I wrote above, expanding it a bit.
Photoshop is a handy tool but it tends to attract people who are not web designers (there was a thread few days ago that you should hire a web designer for web design; a logo designer for logo etc.); also, it requires some experience with XHTML/CSS to get the fonts right, or realize that grid matters.
On the other hand, current CSS frameworks are rather painful to work with. I saw Blueprint hijacked million times, and the whole reloading concept is a big headache for non tech savvy folks. (unfortunately, the same applies to Compass)