The TouchStream - Yet Another Keyboard?

omen asks: "I know the subject of keyboards seems to come up every week or so, but the FingerWorks has recently come to my attention. Before I shell out $330 for the TouchStream Stealth, I was wondering if anyone has any experience with it. Is the gesture system useful? How hard is it to get used to 'zero-force' keys? How well does the 'two finger' mouse work? Any thoughts on the Qwerak layout?" This keyboard looks to be another incremental improvement on ergonomic keyboards, but are these keyboards really good enough to justify their prices?