I may not be correct in all my answers, but I will give it a try.
You can post all the things you are speaking of here but you must use the proper code. There are no magic buttons here so you have to figure out the codes for what you wish to post.
Its all basic html stuff that you could easily get from a free tutorial on many a site.
I can write in many different fonts by using HTML!
Post a link Wiscoy Site
Do silly things.
I LOVE
LABS!
A tutorial to all these types of things that is very easy to understand is HERE
Keep in mind that some dont appreciate posts with too much hoopla, but a few of the basics help you to be able to communicate all kinds of nifty things effectively!
As for the threading, keep in mind that any time you post a reply it will be linked to EXACTLY where you entered you reply...and to Whom you reply to. You may actually be replying to a reply etc etc
Good luck, and I hope I helped a little!
Annie