has there been any thought about Dryad Arbor as a dread return target that can trigger Bloodghast?

^ It's an idea but is it really better than any of the alternatives that return Bloodghast? 

Undiscovered Valley= ghast every turn + multicolored sideboard options + taps for fatestitcher
City of Brass= multicolored sideboard options + taps for fatestitcher
Seat of the Synod= returnable with Sharuum + taps for fatestitcher
Oboro, place in the sky= taps for fatestitcher+ possible returns ghast every turn
Strip/Waste= distruption
Cephalid Coliseum= taps for fatestitcher + alternative/compliment to Bazaar
Dakmor Salvage= potential ghast return when in the yard + crappy dredger
Petrified Field= gets a land back but doesn't produce colored mana

What does arbor do?  It sits there and doesn't generate any practical mana and chumps for a zombie token when needed. It can be useful but there are better alternatives out there.  Having blue mana available is awesome in combination with Fatestitcher.  HE... WINS... GAMES. Nuff said.

That doesn't appear to be the case.
http://www.wizards.com/default.asp?x=dci/suspended