Another nice find, Open ERP:
http://www.openerp.com/. While doing research for my current open source project, CloudERP, I came across this gem. It was released in '09 and seems to have a tremendous amount of financial support behind it. The English is terrible everywhere but the cloud hosted and open source host yourself options I've been reading about seem really nice.
My project is in the Force.com cloud (Apex/Visualforce). Salesforce.com was originally just a SaaS CRM solution and later evolved into a PaaS for basically anything you desired to create. I have noticed that although SF is very open source friendly, they have few robust free options at their AppExchange. Most everything, and there are dizzying thousands of apps in every conceivable category, is either charge through the nose up front or hook em with a "free" trial and sink the teeth in after they've finished their "trust fall" into the happy finish of your P&L statement. In other words, ITTO sees too many sharks at the AppExchange and plans to offer free alternatives to their cloud gouging frenzy

On another note, Silicon Valley rocks. The Salesforce-hosted developers group last week was amazing (it was free, as in free beer) and I'm crashing the party at Googleplex tomorrow night (again, as in lots of free cold beer). I joined this Google group that meets once a month to discuss the future of their PaaS offerings, among other things.
I'm feeling a

explosion coming on...