I got my PS Manual USBPass about 2 days ago from Puresmoker's UK distributer e-cigs.co.uk and tried it on the my PC USB and it worked very well. I would say I got about double the vapor that I get from my old USB PassThrough Battery.
Today I received my Pluscom AC 7 port USB Hub from a seller on Ebay which has an output of 5v 3000ma, I would say the vapour output has doubled again.
Here is the Ebay link if anyone is interested, I am in the UK so this is a UK seller. It cost £7.89 with free postage
Sorry cannot post link yet replace the h**p with http
h**p://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280376805594&ssPageName=STRK:MEWNX:IT