From The Ausiello Files, over at EW.com

• Emmy-winning suds vet Heather Tom, who's currently giving her tear ducts a workout on The Bold & the Beautiful, will be moonlighting on Ugly Betty this fall. She'll play a state department liaison to Daniel's long-lost son in at least three episodes. I'm going to venture a guess that Daniel Sr. will want to, ahem, liaise with her as well.

http://ausiellofiles.ew.com/2008/08/casting-scoops.html