Hiya,
No the polygon stuff hasn't changed. Most resources is spent on support at the moment, and writing that and debugging this feature will take far more time than I have available for the project. Its easy for trivial cases (rectangular only, etc) but once you start throwing everything that is possible in tk2d it becomes a VERY complicated and will take a substantial amount of time to code.
I can however, make the collider generator a plugin, so if you write your own you'll be able to maintain it without messing with tk2d code and still maintain tight integration. Let me know if thats something you'd like to have.