Mozilla...
If you're just after a better browser, try Chimera. http://chimera.mozdev.org/ It's in the early stages of development, but it is coming along nicely.

MP3 tagger...
Try MP3 Rage. It's shareware.

Canon cameras...
If the CRW format truly is raw, then Photoshop and maybe even Graphic Converter will be able to open them. You'll probably need to do a bit of guesswork with the header length.

Sleep...
Under Mac OS 9, you could do this with an AppleScript, so that route might be worth inventigating. Alternatively, maybe try a QuicKeys macro to go to the apple menu for you.

Virtual Windows...
This is a nuisance to me too. I found space.dock buggy and inelegant. I've resorted to just holding down option when switching apps.