it would be absolutly perfect, to have something like the wordpress or TYPO3 extension repository for piwik extensions.
I think the following features are needed:
So we will need a server and a client part.
Todo for server part
Todo for the client part
I think most of the functionality could be integrated into CorePluginsAdmin and there is already done a lot. ;)
I hope this idea helps to improve piwik. If you need a very usable repository please have a look of the one implemented for TYPO3, perhaps the TYPO3 project gives you the chance to use parts of the TER code.
Rescheduling for post-1.0 ... unless someone wants to pick up the ball and run with this...
I'm closing this and gathering requirements for both server and plugins in the ticket: #1116 - please write your comments and ideas there :)