Here's how you do all the fancy things in this forum, from bold lettering to links and images. Please post any HTML related questions in this thread. By the way, this works for normal posts as well as sigs!

Bold: <b>bold lettering in here</b>
Italic: <i>italic lettering in here</i>
Underline: <u>underline lettering in here</u>

& (Ampersand): &amp;
< (Less Than Symbol): &lt;
> (Greater Than Symbol): &gt;
" (Quotation Marks): &quot;
(Blank Space): &nbsp;
Images: http://www.website.com/image.png">
Links: http://www.website.com">Text for the actual link

Center: <center>Everything in here is centered.</center>
Bigger Font: <font size=+1>bigger font</font> (Play around with the numbers to make it even larger)
Smaller Font: <font size=-1>smaller font</font>(Play around with the numbers to make it even smaller)
different colors <font color=red>different colored letters in here</font> (Play around with the color to choose a different one)

That should cover the basics. Again, any questions you may have, please post in this sticky thread.