Before I even read your question, based only on the title you chose for this thread: No STD or HIV ever is transmitted by fingering or genital-to-hand contact. If that is your only exposure, you have no worries.
THIS IS ANOTHER INFORMATION I GOT FROM THE NET: ALL THE SAME FOLKS BE VERY VERY CAREFUL..
QUOTE FROM AN INTERNET SOURCE (might or might not be true)
If there has ever been a case where someone was infected with HIV via "fingering", I have yet to read about it. To my knowledge, no one has ever been infected this way, and I doubt very, very, very strongly that anyone will *ever* be infected this way.
In short, Teak was correct, fingering is not a known risk factor for HIV.