I've established an OTC exchange in Google Spreadsheets:

https://docs.google.com/spreadsheets/d/1K4gjPXrTr6Nxqpm8GqlATPj9H35LYcevaUbJobsGT0I/

It's only a temporary measure, I think it won't be necessary as soon as we hit an exchange.

Drop me a PM or reply here to get into the spreadsheet and don't forget to specify a volume and a price.