AT&T to launch Windows Phone 7-powered LG C900 on September 28th?

You’ve got your camping gear packed, and a full night’s supply of coffee prepped. You’re all ready to camp out on the sidewalk for what may very well be the first Windows Phone 7-powered phone in the US: the LG C900 for AT&T.

There’s only one problem: you don’t know when to show up. Now we might!

The eagle eyes over at PhoneArena were digging around the C900’s Bluetooth Certification page and found this little gem:

The supporting features related to BT of this models are like bellows; – RF : 2.1 + EDR – Profile : HSP, HFP, A2DP, AVRCP, PBAP This model will be available on Market around 2010-09-28 .

September 28th, you say? Why, that’s only a little over a month away. We’ll have to see just how far they plan to stretch the definition of “around” in “around 2010-09-28” — but either way, Windows Phone 7 is coming soon.