I'd be concerned it will turn into the "Link my page for a dollar" and "retweet this to your 10k spambot followers for a dollar" that detracts from the usefulness of these kind of services.

The gamification suggestions going on in your G+ discussion [1] are intriguing. I could imagine trading in a virtual currency for fixed or variable priced favors and looking to trade that back in for some help in areas where my skills are lacking.

https://plus.google.com/111020520676817671277/posts/VhBuNXfv...

I like it, couple of potential problems though:

1) If I'm on the provider end, am I in a race with the entire planet to get the job done first? Is $0.75 worth that?

2) Since the task can go beyond information, an exchange between buyer/provider is needed, how will this happen? File transfer might be easy, what if I'm request something requiring physical access (put air in my tires)? Will you monitor it somehow for tasks than can be completed by people over the internet, will you host files, etc?

3) If you are transferring files, how do you provide privacy?

How does it differ from Amazon's Mechanical Turk?