I saw a really fun Twitter based tweet fountain at a conference I was at yesterday. It grabs tweets based on keyword/hashtag and then flips them on the screen in a prezi style zoom in around and zoom out format. VisualTweets says of itself:
Display tweets using one keyword or hash-tag. Accept and Reject different Tweets with one click. Utilize different Plugins to go full screen. Auto refresh every 30 seconds. Style your Display Board. One easy to use manager.
I really enjoyed watching it, and so did other people at the conference too. If you're looking for a fun way to provide access to Tweeted content, this is a contender.