Sandy,

As you probably know, there are Many reasons why people would rather use Craigslist than most Boring Realtor web sites...

Since I track Craigslist news amongst other interesting stuff...

Some might enjoy the following and get a few Ideas & Answers...

The Architecture and Ambition of Craigslist
http://blog.topix.com/archives/000095.html

http://24hoursoncraigslist.com/subs/nowplaying.html

Phil