For a quick link to Maaya lyrics or English translations of lyrics, I've created this handy sticky topic. There's really only two places you need on your bookmark tab:
First stop for anyone looking for English romaji and translations of Maaya lyrics, run by the wonderful Frecklegirl. I'm sure everyone agrees that this is the one-stop shop for English-speaking fans.
If you're looking for original Japanese lyrics, then Uta-net is the official, sanctioned by the Japanese record industry, place for Maaya lyrics.