As posted in numerous other threads about an OS update for the OpV... if Virgin Mobile pushes out an update, everyone will know about it looooong before the update gets pushed. It'll be all over the mobile news sites, and VM would let their customers know. Just like they did with the last OS OTA update.
As for weather or not we will get one, unless VM isues a press release and says so, it's nothing more than an opinion. CSR generally do not have that information.