When I think of a new web enterprise I usually have a problem finding good and available domain name for it. So, the idea is to start a specialized search engine, which, for a given domain name, would find a list of similar sounding / looking reserved domains. That would help avoid buying domains, for which exist very similar, already taken domains. Example: simila.com / smila.com.
Technically I would use Daitch-Mokotoff algorithm (maybe slightly modified) and some open-source search engine (Lucene at first attempt). The only problem is to gather a list of domain names already taken. Any ideas where can I find them? Buy them? Steal? Beg?
To sum up: I would use this stupid machine every day. Many times.