When setting up their personal currencies, individuals would create and upload personal profiles that would be visible (if desired) to other Augmented Reality-enabled cell phones. These public or semi-public profiles can include a listing of their "asks" - and of their personal offers to make specific kinds of time/skill donations or trades.
When a conversation with another person led to a decision to explore a transaction of time-based services, an Augmented Reality app or mashup for personal currency exchange would make the related profile information from both parties mutually visible.
Each popup profile could include links to a trusted third party site where one can review or drill into summaries of prior work done and explore feedback ratings earned from past services.
With this information, the parties might agree an exchange rate (e.g. @sebpaquet’s 1 hour = @openworld's 1.5 hours) and commit to give one another personal time donation vouchers for the agreed number of hours and types of service.
Via Gary Hayes