Interesting post on The Joel on Software Forum - CityDesk and swf. Talks about designing for expert users as well as for novices. How to integrate these two concerns is an interesting topic and I think it's discussed well in chapter 11 of Programming as if people mattered by Nathaniel S. Borenstein. The Amazon reviews are a bit unfair, some of the examples may appear dated but the underlying principles are timeless.

I especially like the advice to listen to your users but ignore what they say. It's suggested that you consider them like a class of three-year-olds. If they're all crying for a cookie you don't necessarily give them a cookie, but you might want to prepare them a nourishing lunch to address their real needs.