For some weeks now, pecio's source code is available on github: http://github.com/iperatoner/peciocms
Github offers, as most of the project platforms out there, the possibility to add issues (bugs, feature requests, etc.) to a project. Today I added the things that were on my todo list. If you have any further ideas for features/improvements or if you found bugs, just create an account on github.com and add your issues.
There's also the possibility to vote on issues. So, if you like a feature request or if you are affected to a bug, you can vote on that issue and I can see which things are most important for the users.