Here is an interesting one if it pans out. Singer-songwriter legend Leonard Cohen recently announced his first U.S. tour date in forever (February 19 at the Beacon Theatre in New York), and it is strongly rumored all over the net that he will begin his American tour in Austin at The Long Center on April 2, 2009. Being a decently big Cohen fan myself and noting the rarity of the event, my curiosity was piqued as to whether he would also play a Dallas show. After a few clever Google searches, I found the official site for Grand Prairie and the Event Calendar shows an April 3 listing for Cohen at Nokia Theatre. This certainly jibes with the Austin date, making both seemingly likely. I will post more when I know it.
Note: The Grand Praire calendar also shows a May 5 date for Flight of the Conchords at Nokia, which hasn't been officially announced either. This would also be a great show for Dallas to get.