yeah, any bluetooth keyboard will work, and any rf or lazer one with a usb dongle will as well.
but, they aren't so different that you wouldn't just get used to it. the command apple key is basically used instead of control for most keyboard commands, and you can set the f keys to whatever you want if their presets bother you.
I love my Apple BT Keyboard and Mouse. They take seconds to connect and are easy to pack in a bag. I just wish there was a carrying case built for them both.