Actually, that way you are pronouncing Maimo, not Maemo. Access already linked a clip in this thread in which he pronounced it the Finnish way. Spanish is very similar but the stress is in the middle of the word, not in the beginning.

This discussion is kind of funny though. One might think it would be easy to describe in words how something is supposed to sound but it's not.

If you pronounce it May-moe, you'd be right if the OS's name was Meimou, Mee-mo would be ok if the OS was Miimo and so on..