Creating Web Widgets with Rails

Has anyone created any widgets using Rails? I would like to be able to make one of those nice little links that someone can paste on their html page and get a little part of my rails app to show on their page. I googled around, but can't find anything. Any help would be greatly appreciated.

Chris, Thanks for the info. I can't seem to find anything about it. I will definately be posting on my blog when I do.