NopCommerce is one of the best opensource project, well architectured, well maintained and supported. However, it is yet not adopted widely, may be because of lack of proper documentation, here are my suggestions (copied from some forum of course) which I think if made.. then nopcommerce has the potential to be hugely adopted...
- Public Continuous Integration Server (Teamcity, TFS, Hudson, etc., usualy free for opensource)
- Public Wiki editable by community
- Code-Quality - better unit test coverage
- Automated acceptence testing + public living documentation (specflow + speclog, mspecs.. free for opensource)
