Quick App: CraigsMobileList for iPhone
Recently, I have been doing some freelance job hunting and I've found CraigsMobileList [$0.99 - iTunes link] to be quite helful in sifting through the craigslist search results.
The app also allows you to bookmark searches, post ads, favorite certain results and set filters for your searches. Also, you can keep a recent city search list (helpful if you are looking state-wide results.)
If you're an "usual" on Craigslist, then this app if for you!