Vladimir Prelovac has come up with yet another cool plugin, this time called Live Blogroll. Live Blogroll replaces the default blogroll in that when a user hovers their mouse over a link, the rss feed from that site is aggregated in an Ajax created box showcasing the most recent (configured number) of posts. The Live Blogroll uses internal caching for feed discovery and WordPress caching for RSS feeds to keep everything from slowing down to a crawl.
Vladimir is on a roll in terms of creating cool WordPress plugins. This one is yet another shining example.