if you visit
Acer Android Tablet Forum - they maintain a great list of accessories, here's a cut & paste but I lost the hyperlink info:
Acer? Iconia Tab A500 Protective Case
Gizmo Dorks Hard Shell EVA Case (Black) with Carabiner Key Chain
CaseCrown Faux Suede Zip Sleeve Case (Navy Blue)
CaseCrown Faux Suede Zip Sleeve Case (Black)
CaseCrown Dual Slash Synthetic Leather Sleeve Case (Grey/White Stripe)
USA Gear FlexSleeve Neo-Cushion Protective Cover Case Guard
Targus - A7 Netbook Slipcase - Black
PDair Leather Case for Acer Iconia Tab A500 - Book Type (Black) Ver. 1 (added 5-8-11)
PDair Leather Case for Acer Iconia Tab A500 - Book Type (Black) Ver. 2 (added 5-8-11)
PDair Leather Case for Acer Iconia Tab A500 - Business Type (Black) (added 5-8-11)
PDair Leather Case for Acer Iconia Tab A500 - Horizontal Pouch Type (Black) (added 5-8-11)
PDair Leather Case for Acer Iconia Tab A500 - Vertical Pouch Type (Black) (added 5-8-11)
FYI - I bought the Acer, and I think it's a little expensive for what you get; don't get me wrong it a great case if you are looking for something to protect it while in a briefcase or knapsack, but I am not comfortable carrying it around by itself (like to business meetings).
Enjoy