there is quite a few "mash" terms and sites on the web today, like, mashable.com, a Mash-up is a pretty poular term http://en.wikipedia.org/wiki/Mashup_(music)
and
http://en.wikipedia.org/wiki/Mashup_(web_application_hybrid)
I think its a pretty decent domain, end user with some kind of web 2.0 app could pay some $$ for it.