Gary Key has informed XDA (and other tech sites and forums) that Jelly Bean will be released for the Transformer Prime (TF201) and Infinity (TF700) in North America within the next 2-3 days.
ASUS teases Jelly Bean update coming to Transformer Pad Prime and Infinity within 72 hours -- Engadget
Don't know how many folks have these tablets, but keep an eye out as Jelly Bean should get some nice responsiveness enhancements to any Android device.
If you do upgrade to JB, in order to get a smooth experience take a look at this helpful post concerning updating on Asus tablets:
[GUIDE] How to update your firmware OTA - incremental changes & full OS updates.