I believe they are indeed doing an Android app (hooray!). For now, like Jarhaven said, you can still check stuff out via your browser...but I'm super-keen on being able to stare in fine app style at a larger representation of my Glitch on my phone. :)
As Jarhaven already posted, you can do just use your mobile browser to go to the glitch site. There you can do just about everything but actually play the game.