TUAW reports that three big updates are available in Software Update: Aperture 3.1, Java for Mac OS X 10.6 Update 3, and ProKit Update

Aperture 3.1 weighs in at nearly 375 MB. Aside from the usual improvements to "overall stability and performance," Aperture 3.1 brings compatibility with the brand new iLife '11 suite. There's also a whole host of bug fixes -- too many to list here, honestly.
Java for Mac OS X 10.6 Update 3 is about 78 MB and updates Java SE 6 to 1.6.0_22.

  Software updates: Aperture 3.1, Java Update 3, and ProKit Update