Re: [19 TH/s] BitMinter.com [ASIC support: var diff, Stratum, GBT, rollntime]
I have a 3/31 Jalapeno that I did recently upgrade to 7 and I'm pretty sure by the time it gets to me I might be able to use it to warm a mug of coffee. That was a serious jump and we currently seem to be without WhitePhantom and CloudHashing 
Is that just firmware ?No, I purchased the chip upgrade to 7Gh/s. I believe the firmware you're talking about is what is allowing people with 7Gh/s units to hash near or at 8Gh/s. Which still won't be worth a darn by the time is actually arrives.
http://www.kano-kun.net/?p=70
The upper limit depends on the chips in your Jalapeno ... but no, the point of that is to go from 5GH/s up to higher rates ... like 8GH/s