Hey champ,
Well the obvious one is TPF - ThePurseForum/PurseBlog, but there's also TheBagForum. Also, PursePage; which is kinda more like a blog and isn't set up like a forum but you can comment. BagaholicBoy is another one that's pretty informative and is based in Singapore. I quite like it as it has plenty of information, but again is set up more like a blog.
Enjoy