I am partial to the vienna, or kings indian opening(white) and experimenting with sicilian(black).
I believe Kasparov won the first match vs deep-blue, after which deeper-blue*1 won the rematch, and upon doing so retired much to the agaust of Kasparov. I believe that IBM did this in spite of Kasparov's rudeness, as he suggested that there was outside interference; aka. some other grandmaster inputting moves during the match.
In the chessmaster series there are fully annotated coverings of both the matches.
*1. After the first match the deep blue program was over hauled, as well as the actually hardware was supped up considerably, hence the name deeper-blue.
http://en.wikipedia.org/wiki/Deep_Blue