Mac OS Updates: JavaForOS and ProKit, and FaceTime beta

On the same day of Apple's Back to the Mac event, two new updates are released: Java for OS 10.6 Update 3 and ProKit 6.0.1.

Space difference between before and after:

Command: df -lak	Used(Kilobytes in 1024-blocks)
Before	...815,956
After	...604,348
Difference (A-B)	-211,608

After that, I downed FaceTime for Mac beta. It looks like Skype or iChat. I tried it without any calls because it was too late. With it I can make any calls to another Mac or iPhone FaceTime over Wi-Fi. One thing I feel not convenient is that the contacts do not have groups, nor search is available. I can add my favourite, that's it. Here is the space difference before and after the installation:

Command: df -lak	Used(Kilobytes in 1024-blocks)
Before	...4,348
After	...40,876
Difference (A-B)	36,528