I wouldnt expect it. Atleast not from VZW. They will be releasing the Curve 2 for the holiday season and will more or less forget about the 8330.
The most recent provider OS release was a small fix, and not even a broadcasted update. Don't expect anything new for the 8130, 8330, or 8830 as they have, or will be, replaced with the Pearl flip, Curve2 and Tour respectively.
Just hope you can upgrade to the Curve2 in the next couple months. I would say we can expect the 5.0 OS on it. But don't quote me on that.