The finger works. Yoda would have fingered Luke if he had a finger.
But all he had was that claw.
Also: Yoda hadnt got broadband on Dagobah, so he may not have had the pleasure of learning PH squasi-spellings, so we have to assume that he would use it, if he were, infact in possession of such knowledge.
LOL
Nevaaaaaaaaaaaaaaaaaahhhhhhhhhh...! 😉
Seriously, it does.
(Blue LED lighting all under the keys.)
http://www.amazon.co.uk/Saitek-Eclipse-Keyboard-Blue-LEDs/dp/B0009O8YBY