|Just about any wireless keyboard should work with a PS3.|
"Pairing" is what you do with bluetooth devices, not 802.11 wireless ones.
The keyboard manual (if it exists, very doubtful) wouldn't show you how to connect it to a Playstation anyway since Microsoft & Sony are rival companies. If anything, your PS3 manual should show you how to connect a wireless keyboard to it.
You connect wirelessly using the same procedure as you do for any wireless equipment.
message edited by phil22