Google Code’s bug tracker and Github’s issue tracker have this notion of “starring” or “upvoting” a bug that users would like to see fixed (give priority). This seems like a useful feature to have to better determine bug priority.

Submitted by Zef Hemel on 9 February 2010 at 09:56

This is indeed a nice feature to have. Yet I believe, considering the size of the projects currently on YellowGrass, that it will not receive many votes. Furthermore, considering the number of developers, the voting would most probably be ignored. I have marked the issue as a future item. It should be reopened when bigger projects join YellowGrass, or when projects on YellowGrass grow in size.

Added issue voting in the last update of YellowGrass.