I wouldn't hold your breath for an update soon from HTC. They've hardly got a good reputation for releasing ROM updates.
One example is the QTEK 8500 (StrTrk). Many U.S. customers (ok, they imported their handsets from UK) couldn't use the phone because of an idle/sleep issue. I don't even recall them ever fixing that handset, but Cingular released the 3125 which was the U.S. specific version of the 8500 many months later. Those US owners of the 8500 were left stranded.
I also don't recall seeing many VOX rom updates either from HTC, only ASIA versions.
The feedback on this HTC Wings/S730 handset within only 2 weeks of it's release indicates most, if not all, of the new owners disappointed with it, or crying out for a ROM update already, or a hardware hack to try and get GPS to work which would invalidate the warranty anyway.
I was undecided whether to get one myself before it's release, but since I've read all the 1st impressions on this forum I'm staying well clear. It seems it only offers 2 advantages over the VOX, slightly faster and 3G capability. Aside from that, I'd say the majority of VOX users who are currently overclocking their device wouldn't benefit much from an upgrade to the S730 unless they need actually need 3G for Video calls or data transfer.
Perhaps if a network provider adopted it and submitted some improvements, then I'll reconsider