I just did a search online and this was the first link I found. An article saying a tweet came out today saying :
"I am pleased to announce that an updated beta version of the #Theme Builder with support to all 6.0 devices will launch by end of January."
So not long now folks!!! :D
RIM Releasing Updated Theme Builder With Support For All BlackBerry OS 6 Devices By End Of January | BlackBerryRocks.com