While reports have ranged that the first Android handset will come out anywhere from October to sometime in 2009, the latest rumors have the HTC Dream (codenamed “G1″) going on presale for existing T-Mobile customers starting September 17th.

The guys over at TmoNews say they have some trusted sources who have priced the handset at $399, or $150 for existing customers during the presale, which will start September 17th and only last one week. A public launch, and availability for those who aren’t current T-Mobile customers may not happen until beginning/mid October.

The newest leaked features include a 3-megapixel camera, slide-out Qwerty keypad and three color varieties: black, white and brown.

We’ll keep you updated if this rumor develops