multiple currency

Hundreds of communities trading with complementary currencies need this!

Two years ago, working with the UK Coordinator for LETS I prototyped an architecture to support these communities with all their variants. Right now I have time to port it to Drupal which is the obvious platform. Progress is slow because I'm learning on the job, so this project needs mentoring.

Drupal E-Commerce module currently support for single currency only. This means all of your products can only base on a signle currency format, within DB, for customer browsing, for transaction, and also for accounting. This will be a trouble, if you hope to setup an auction system as like as eBay, or even simply hope to use Paypal module in where local currency is not support. The need of multiple currency supporting is clear.

By the way it is also a complex problem (from http://www.xencraft.com/resources/multi-currency.html) :

when redesigning the software to accommodate different or multiple currencies, the designer should be careful as to which aspects are determined either by user preference (which may in turn be indicated by locale), by regulation, by the nature of the application, or perhaps by other factors. The appropriate determining value(s) will need to be a part of the API.