I've been wondering the same. Right now I'm at 25MB. I only have 445.9k used in databases (411.7k in the RMS Database). Now, I do have a number of programs installed (Opera Mini, Gmail app, JiveTalk, FreeRange, XM Radio Mobile, BBLight, MidpSSH, Live Search, amAzeGPS, TV Guide Mobile, SameCell Cell Capture, the Precision theme, and a few games...man, more than I'd though). Adding those up, they come up to about 4484292 bytes. Add that to what I have now and I get 29383843 bytes. That's nowhere close to the amounts other people are getting and that would be with no apps and a stripped down OS. I'm confused.
45+ are usually people with the 8330, which has 96 onboard.
Now I read this. lol]