I recently got Acer's bluetooth keyboard designed for the Iconia A500 and A100, and it works very nicely. It even pairs well with my wife's Blackberry Playbook (hey, it was a steal at $140, and she swears by her Blackberry, so why not?).
Just noticed that Toshiba makes a bluetooth keyboard as well, and they must be from the same manufacturer. Compare:
I got the Acer keyboard on eBay for $39, and I saw an ad recently for the Toshiba keyboard for $38, so they're pretty comparable in price. My guess is that if you wanted a keyboard that you knew was compatible with your Iconia, and the Acer isn't available, you could probably go for the Toshiba.
Just noticed that Toshiba makes a bluetooth keyboard as well, and they must be from the same manufacturer. Compare:
I got the Acer keyboard on eBay for $39, and I saw an ad recently for the Toshiba keyboard for $38, so they're pretty comparable in price. My guess is that if you wanted a keyboard that you knew was compatible with your Iconia, and the Acer isn't available, you could probably go for the Toshiba.