XAT released a new power today; it’s called “clear”.
The “clear” power allows a user to give a clear background to any “yellow” smilie or smile, but can be only used with () smilies. This power can be used anywhere a smilie can be used; in your XAT nick, as a XAT avatar, or in a message.
Usage: Add #c to the smilie code
Cost: Unknown (as of this post the cost, quantity, and check columns remain blank on the XAT powers page.