iPass is a connectivity (wireless & wired) aggregator which simplifies the process of getting access to connectivity when traveling. My company recently started using it for people who travel a lot -- like me!
Booted the laptop, started the iPass Connect application, it found the T-Mobile wireless and I simply selected connect.... Poof... I was connected and my boss is being billed directly :-).
So, after bashing iPass about their data requirements for downloading the offline hotspot locator, I'm happy to say that their product does seem to be working as designed. More testing in London, HKG and Tokyo after this.