You can help the development team keep up with the bug reports by closing duplicates, helping to clarify reporters’ problems, and confirming that you can reproduce bugs.
You can view the entire list of open bugs, or browse Banshee bugs by various attributes (ones with unreviewed patches, etc).
You may not have permissions to do much at first except comment - which you should feel free to do. You should read GNOME's bug triaging guide.
