We have used LV2009 for one large project and never since.
That was because of many failures.
For instance: Error in Line XYZ in MemoryManager.cpp.
LabVIEW crashed with this error every 2-3 runs. Also after we updated to LV2009 SP1...
We switched back to LV8.6.1f1 and everything works fine.
Also the VI and EXE files were larger (LV2009: 15Mib / LV8.6.1f1: 12Mib)
We use almost everything of LabVIEW, except of Mathscript and Remotepanels.
Our applications have about 200 - 300 self made VIs.
We are in need of better multicore processing, but LV2009 is to unstable.
But I think, wether to use LV2009 or not depends on your needs.
If you do parallel computing and need more performance using multicore processor,
LV2009 might be a good choice.
If you only do "normal" stuff, LV8.2 or LV8.6 / LV8.6.1f1 is the better choice for now.
Install LV2009 on one computer, load some of your projects and do some
tests. (Also perform some errors!!!)
Greetings, LogMAN