bug trackers, google documents, and wikis can all be used for this end. Good luck!
Does a tool exist to share UAT feedback?
I have an existing UAT feedback form. We would like to be able to make previous feedback available to users whilst they complete their feedback, so we don't get duplicates. Is there a tool to facilitate this?
The problem you have is a common one. Testers working in different time zones and in different groups can uncover the same problem and submit duplicate reports.
I agree, the tools that Matthew suggested will certainly work for you. I have found that when a project is small, simple tools work fine. However, as the project grows in size and scope, time spent manually managing simple tools can grow accordingly. At some point, you may want to look at a more sophisticated integrated tool. I personally like Confluence wiki. You might get some ideas from this document. http://getzephyr.com/insights/best-4-collaboration-tools-agile-software-....