Evan Jacobs is one of the developers doing some really interesting things with the Twitter API. Instead of using Twitter as a means of broadcasting information, Jacobs' apps are actually gathering information from Twitter to turn it into something more useful.
No-one likes a spammer, so 'high fives' for the development of more spam-obliterating solutions. Be it blogs, wikis, guestbooks or discussion boards, all have been the victims of spammers' endeavors to increase their search engine ranking. Comments are automatically posted in their dozens on multiple sites, and the process of manually deleting each of these is becoming increasingly tiresome. Comment SPAM Wiper (CSW) and it's SpamWipe API are designed to automatically protect a site from spam comments, posts, track-backs, ping-backs and the like. Hooray!