When I upgraded to OO Pro, my keyboard shortcut for the "Search with Google" service was taken over by OO Pro's "Add to Clippings" service.
I checked OO Pro Preferences to see if I could change its keyboard shortcut - no luck.
Fortunately, a
VersionTracker search turned up Peter Maurer's excellent
Service Scrubber utility (donationware). In addition to restoring my "Search with Google" shortcut, Service Scubber also really slimmed down my Services menu, which was filled with services from applications I've installed but never use.