Many possibilities here...
U-joints(new or not, they can still make noises)
Stub shaft or hub shaft spline wear
Front diff mount bushing
Strut rod bolts not tightened
Diff crossmember mounts/bolts
Trailing arm bolts not tightened
yadayadayada...
The only real way to verify the source is to have the car on a drive-on lift. Then you can put the driveline under tension, and locate the source of the noise. With the wheels hanging, there is no real stress on the driveline.
Hope this gives you some ideas.

Thanks Joel,

Instead of doing the work myself, I opted, due to a heavy work travel schedule, to have it done...  Guess that old story, if ya want it done right, do it yourself, holds true..  

Bill (Fellow Texan)

Joel is on the money.  But go around and tighten all of the bushing bolts.  I have found that many times behind some one elses work.