A warning for those of us stuck in the past:
At present, the Inventor 2010 downloads page lists none of the four regular Inventor 2010 service packs available. Also, the Inventor 2010 setup will fail to detect those updates during installation, instead noting that the version being installed is up to date.
Those service packs are still available directly from Autodesk. Links posted below for the future perplexed.
Autodesk Inventor 2010 Service Pack 1
Autodesk Inventor 2010 Service Pack 2
Autodesk Inventor 2010 Service Pack 3
Autodesk Inventor 2010 Service Pack 4