I have a project coming up, i plan on having multiple concurrently running applications running on a N900 that can automatically post and retrieve information from a CMS. Right now I am thinking about using Microsoft products for the database server (Server 20008, Sharepoint, MS-SQL), mostly because I am familiar with it and I do not know much about database setup and server configuration, and I know how to get Sharepoint up and running.

Cost aside, what other CMS, maybe from the open source community, should I also consider that might be better? Ease of use is important for me, I don't want to spend too much time getting it up and running. Anything better for integrating with the N900? If we were planning on releasing this project to the open source world, what would you prefer to see over a closed/costly Microsoft solution?

Thanks for you input, I appreciate it!

EDIT: The CMS must support blog, forums, file checkin/checkout, wiki, strong security, photos, maybe video if possible. Multiple solutions might be ok as well. I was thinking about using Sharepoint and VisualSVN server.