Welcome to @WhoisBot homepage.
What is @WhoisBot?
Simply, it's a whois service for twitter.
How do I use @WhoisBot?
To use @WhoisBot you need to be a follower (and it needs to follow you back... it will do this automatically every so often -- trying to get twitter to automatically do this). Then you simply direct message whois bot a domain name:
dm whoisbot domainname.com
whoisbot will respond in a couple minutes (also working on increasing quota of queries to make this faster) with the availability of the domain you sent.