Perry E. Metzger says

Currency needs to be fungible -- your time and my time and the time of a brain surgeon are not the same. Furthermore, I can't verify that you are actually giving me your time. It would be a nightmare.

I see that my post was ambiguous. I didn't mean that "time" would be the currency, rather, "time" would be the "good" purchased. For a given task, one person's time would be more valuable than another person's time. Online reputation services would be necessary. I guess what I'm really trying to say is that I believe anonymous digital cash is currently more suitable for purchasing services (time) than for purchasing goods (software, information, bananas, etc). This might change in the future when the use of anonymous digital cash becomes wide-spread. Jim_Miller@suite.com