I can CONFIRM that ArcSoft DOES send and RECIEVE on a Sprint Touch Pro.
Here is how:
Install Juggalo TP ROM v0.5B for Sprint:
http://forum.ppcgeeks.com/showthread.php?t=49341
Install Arcsoft MMS (this is the one I used):
http://forum.ppcgeeks.com/showthread.php?t=48881
This was all that was done after the ROM install. Since then I have put my normal apps in place and everything is still working fine.
I tested recieving and sending both SMS and MMS by sending myself messages from Sprints Website:
http://pictures.sprintpcs.com
http://messaging.sprintpcs.com
I don't know about a newer version of Arcsoft, I've only tried v3.0.6.22. I don't know about TF3D hanging up yet, I'll run it though its paces for the next day or so and post up any other issues I find.
Now if I could only get a newer version with Sprint settings for it.
-MadManX