I can't think of a way of doing this apart from actually typing in the numbers, which is what I do. There may be a bullet and numbering feature on thisnnew site, but if there is, I can't find it.
The above are the only two functions the site provides.
The only other way would be to create your post in Office withe bullets etc., then try copying into a post. Bit long winded though, by the time you've created your formatted masterpiece, the thread could well be answered! :))