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.

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