155681 rubyonrails website: 7 pages

I need a ruby on rails based website. Essentially a user posts a shared project to begin on a certain date. They then invite others to join the project up to the start. Each project lasts ~10 days and an email with the day's tasks goes out to the list recruited to participate. Each project forms a unique URL or webpage that everyone can add comments to at the start of the project and when it is complete. Users have profiles of username, email/password and the projects they worked on and either zip code or google maps coordinates. need this to be highly accessible from mobile or blackberry. very text oriented.