I'd like to point attention on a problem:
when you publish an rss feed on a widget, and after some time, the website related goes down (and you don't know), the download of the new feed (that doesn't exist anymore), will slow the loading of the blog.
it could be useful to add a "timeout" and a message of error instead of trying to download the feed. my blog yesterday was experiencing 30 seconds of time to load the entire page before I discover it was a feed error!
I hope I've been useful :D