Wheeeeeee!!! I figured out how to do the sparkly background behind the text thing!!! ^__^ You need a transparent GIF for it to look right, but ... whee! I had to try a few times to get it right, but now I've gotten it right and I must share with all of you!!!
Make sure to switch the [ ] for < > when converting into HTML...
[font style="background: url(URL of image goes here)"]Text goes here[/font]
And that's how it's done! I found some really good transparent sparkly GIFs here, including the one behind all this text. Isn't sparkling fun??? ^__^