We definitely feel your pain. Who really knew that the T-Mobile G1 was going to come out. And who knew it would be so great? Certainly not you Sidekick user, you're stuck with that "kid toy" while the G1 is being considered the "grown up" version of a Sidekick. Luckily, you can pose like an Android user with some G1 themes created by CubanitaStylezz.
Hey, it's not exactly what we're using but it's as close as you'll get for now. Don't worry you can still read Android Central and we promise not to look at you funny.
G1 Themes for Sidekick I
G1 Themes for Sidekick II
Be an expert in 5 minutes
Get the latest news from Android Central, your trusted companion in the world of Android