Ok I've got a request that you can bang out in less than a couple of hours. Can you design and task me with a problem that you'd like to see a web app for that can be done in 100 hours or so and would highlight Rails 3.0 features. I'll keep the code on github (victusfate there) and push the live version of whatever it is to heroku.
Basically I'm asking for a homework assignment that would help ramp up my rails skills and maybe be of use to the community. I worked on and helped complete a rails project between Oct '09 and March '10 but I ended up preferring Sinatra/Datamapper for light web apps. Now I'm looking to get back into Rails 3.0.