Well, not exactly halfway, as construction is going to continue until leading up to the 2010 season, but apparently things are moving along quite nicely over at Stadium and Main. Here's the official release from MGoBlue, and considering I'm the last to alert the world of this, I'll give credit to MVictors for alerting me.
The whole thing reminds me a bit of the Iowa construction from 2005, which I didn't like very much. It's not exactly aesthetically pleasing to have a giant frame of a building (make that two buildings) hovering over the stadium during a game. But it's just temporary folks. Of note is that it seems the old press box will remain intact for the coming season, so you haven't seen the last of it yet.