Before too long I will have to be getting a new bike, and I am thinking about various features/qualities. There are some things I have been reading contradictory things about, and want to get some feedback.

First, gear systems. What are the advantages of a hub gear vs. a derailleur? I had a three-speed hub gear back when I was in HS & college, but not since. I would need more than three speeds around here, and I know that Shimano makes 7- and 8-speed hubs. But what are the advantages and disadvantages of both?

I may have other questions downthread.