According to the maintainers this is not a good idea. However, there might be a chance for a project consisting in fixing open Vector issues.
We need to find a scope. The tracking 44881 is just too broad. Would it make sense to have e.g. a selection of UI improvements in the nav bars? Fixes or features that can be agreed with the maintainers and that they will take when meeting the quality criteria. NOT features that would require wide discussions e.g. with the Wikipedia community.
If something along these lines is possible and there is at least one mentor, we can take it for GSOC 2013.