I've been using the Bluetooth remote for a while now and it works great.
There will be an adapter released that allows you to use the previous PS2 controllers with the PS3. That means you could use the old PS2 DVD remote with IR and then program those codes, though I don't know that you would get every function on the bluetooth remote... In theory this should work at least for basic functions, though you wouldn't be able to turn the PS3 on/off with an IR remote because the "PS" button didn't previously exist.