Yes - as long as it falls into the specified range of "picture types", it'll work. My web-service is down temporarily (sorry, Timelord and Hemlock Mike) but will be back up hopefully later today....any animated gif works perfectly !
Now - me, personally being of questionable (please read that as ZERO) artistic skill found those gif animators VERY difficult to work ! I have seen some cool little shareware programs that do most of the work for you though - and it has been a looooong time since I have tried my hand at them.
*****EDIT****** Okay - my web is back up and running now...sorry for the issues, guys !