Here's a listing of codes you may be able to use in your blogs. Whether you can use them depends on if the blog owner allows these codes in their comments.
Italics: <i> and </i>OR <em > and </em>
Bold: <b> and </b> OR <strong > and </strong>
Underline: <u > and </u>
Strikeout: <strike > and </strike>
URL's: The same way you do in your blog. <a href="URL">Text</a>
Trademark: ™ (& + trade + ;) or ® (& + # + 174 + ;)
Quoted Text: <blockquote> and </blockquote>
Thanks Kevin for this link.
