It’s done! Just get a blender 2.5 of revision 27060 or later with jack support and you’ll be able to user jack transport!
Details: http://audaspace.wordpress.com/2010/02/21/jack-transport/
Nice! Thanks a lot neXyon! 
Gotta try this out!
Excellent, been using 2.49b with pyjack for this previously, yet another great audio addition to 2.5, cheers.
Yeeeeeeeees!!! My dream has come true!!! Thank you!!! 
No, seriously, I was waiting for this to happen a looong time. Now I can make animations/movies with Blender and audio with Ardour in perfect sync! Yay!!
Hey, I’m using the latest version of Blender (2.57.1 r36339) and I don’t see it working. There is no JACK support! What’s going on? Am I blind or something?
Thank You !!! Added WITH_BF_JACK=‘true’ to user-config.py file. Rebuild. Tested on version r36993
aww yeah girl
Me windoze, sniff. 