My team recently launched
http://www.gitcoin.co into BETA.
The idea is "Social Philanthropy. Give bitcoin donations to your favorite project(s)"
We want gitcoin.co to be the easiest way to donate/receive bitcoin to a project which you support.
It's currently built on top of the Coinbase API so you'll need a coinbase account in order to receive bitcoin using gitcoin.co. However of course you can donate to any project on gitcoin.co without having a coinbase account.
As I mentioned above the site is in early BETA and we welcome all feedback from the bitcoin community.