I have to agree with OP. I have had my blackbook since day two and now regret not getting a MBP. I am very happy with the speed and all that jazz. Its the small stuff that annoys me.
1. The speakers SUCK. Worst speakers I have ever had to listen to, they just don't get loud enough. The MBP probably isn't a huge leap, but would have made things better.
2. I like the backlit keyboard on the MBP, I occasionally have a hard time finding rarely used keys when sitting in a dark room while watching tv. Not a huge issue, just a very minor gripe.
3. Graphics. The integrated intel graphics just SUCK. There is no other way to describe it. I don't expect to be playing the latest and greatest at 60fps, but I do expect to at least get decent framerates on lower end games for those rare times I dust them off.
4. The case feels cheap. Although it has held up it just feels like a cheap knockoff and on top of that it retains way too much hand grease.
I also had to pay for the 1GB of memory I upgraded to which, by the time all is said and done had brought my blackbook not too far off the retail price of the MBP. Now of course they include 1GB RAM and 120GB drive as standard with the blackbook, which makes it a much better deal in comparison to the MBP and which would have saved me quite a bit of cash.
My biggest reason for not going to the MBP in the first place was the size. I loved the size of the old 12" powerbook, so I thought 15" would be way too big. Now I really don't mind and 13" even seems small. I guess next upgrade I can wait for the super slim MBP.