TechCrunch had an article today regarding a service called Tweexchange. Tweexchange actually started off as a site to sell twitter user names. However that was against Twitter’s TOS. The new site is cool. You can actually type in any phrase and it will tell you whether or not the twitter user name or domain name is available. One features that I like is that the site will also suggest alternative twitter names and domain names and let you know if they are available. There is also a feature that claims if a twitter name is pending delete, it will send you an email if that user name drops (for a fee of $5-) I have not tested this feature but it could be very useful if it works.