I'll admit that I don't have much knowledge on the history of the Melodica festival. It was here, people liked it, and then it went away. Now Wanz Dover and the Stereo on Strike crew are bringing it back.
Check out the lineup here.
Expo Park Dallas is definitely the place to be in late February. As SOS says, ticket info coming soon.
(note: Obviously, we're not working that weekend. Come support this.)