While the keys to the Android 1.5 “Cupcake” SDK may have just been handed over to developers, the clever folks in the XDA-Developers community have been playing with the software on their G1′s for the past few days already thanks to an individual known as haykuro. Very, very long story short; haykuro successfully ported the software from the upcoming HTC Magic/G2 over to the G1. A bit of work is required to get the software up and running on a G1, but it’s not something that would be above the abilities of the average user thanks in part to great tutorials and the help of the XDA community. Plus, it helps that all of the APNs for T-Mobile USA and AT&T, etc come pre-loaded within the software. So forget about waiting for Google and HTC to take their sweet time sending Cupcake your way — hit haykuro’s blog and let us know how it goes.