We should be able to support different ways of grouping items beside traditional way of by category i.e. by tag, mutli-categories, sub-categories. We can even viewed archive as a way of grouping by date. The parser/post generater need to be able to select the posts according based on the grouping we want. The bottom line here is flexible. In Nucleus 3.x, tagging, multi/sub-categories works, but not integrated with core well at all. A lot of hop to jump through to get them working, even not perfectly. (admun)

How about trackback (maybe also pingback?) and weblogs/ping-o-matic ping. We want to make sure we have a base service for these and provide a API for other to add any new service in the future. ie NP_PingPong (admun)

paths and URL. In Nucleus 3.x, blog URL and paths are defined in sometimes both config.php and from global/blog setting. It create confuction from time to time and I think only one place is need to provide the base URL and path. This will simply installation and configuration. (admun)

As a general rule of thumb, backward compatiable should be a norm when possible. It will ease the porting of skins/plugins to Boron. Ideally, hopefully many plugins/skins should be drop in and work or only small changes are needed. (admun)

a functionality for saving values of known plugin options when updating to a new version of the same plugin. p.e. this trick (blvrs2)