Several finalists have been announced in the PayPal X Developer Challenge. Winners will be announced at the DEMO Spring 2010 conference on March 22nd.Two teams will win $150,000 in prizes - quite a boost for cash-strapped startups.

Let's take a closer look at a few of the finalists - you never know, these may spark some ideas for your next web service or application!

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- Chittai: Micro-financing application

- ZippyQuiz: Quiz-Reward application

- NeedaKick: Application for goal setting and motivation

- Rentalic: Person-to-Person renting and sharing

- appbackr: Wholesale digital marketplace for apps

- SoundLoud: Digital music sales

- MyHomie: Application for roomates to share money

- MixCloud: Self-serve advertising server