Recently, Microsoft released System Center Operations Manager 2007 R2. This is *not* a SP release, but a new product. I won't go into the licensing details of this as others have covered it, and a search should get you answers.
I haven't seen anyone actually mention PowerShell at all when discussing the new release.
I'm going to try to spend some time this week and next looking for any PowerShell-related changes.
One thing to note at this point is that the "Command Shell" (see note 1 below) appears to have been renamed to "Operations Manager Shell". The decision was likely to follow along with Exchange, where they have their PowerShell extension named "Exchange Management Shell" or "EMS".
As a result, I'm now going to start using the tag "OpsMgr Shell" when referring to the OpsMgr R2 release, and likely any future releases of OpsMgr down the road likely in 2010 or so (that's nothing official or unofficial... I'm just throwing that date out there).
Note 1: The OpsMgr custom PowerShell console pre-loaded with the OpsMgr PowerShell extensions.