1. The number display format depends from country to country. For example, where I came from nobody really looks at 17,434 as seventeen thousand... It stands for seventeen 'point' ...
So I guess a goos solution would be give freedom to the admin to choose the display format, if this is not made yet.
2. Personally i think that will confuse the users more than it will help them. But that's my opinion. Anyway, I don't see a reason why this should come by default. Simply add it to your template if you really want.
3. Once again, i consider sub forums a huge mistake. It is a popular request though. Don't really know what to say about this one.
4. It doesn't make sense to have by default. A plugin should pop up whit that.
1. Absolutely. That would solve at least 95% of the spam problems. It's the most effective spam protection i know.
3,4,5 - bahhh... punbb in not bloated software.
6. It needs database changes so i don't know about that. If it's not enabled by default i don't see how to implement it cleanly.