The winning items from modelling community site Polycount's TF2 pack contest--such as the soldier pack pictured left--will all be added in the update. Walker reveals that another Polycount pack entry, not named as a winner, will also be added as a surprise--"now not a surprise," he realises, adding "Fail."
The Polycount items will be more unique than most other community-made items, Walker explains. "We definitely have lowballed those in the past, in that we've chosen something that's more underpowered than overpowered, because we can just make it a little better later. The Polycount items have had a lot more time on them as a whole, so, we're doing more interesting stuff there than in general we have with the other items."
Valve expects to release the update next month, though I believe we're bound by the laws of the video games media to point out that anything goes in Valve Time.