The company's put out a press release about taking part in the show and set up a special site for Star Trek fans. Don't get too excited. The site has little to do with Star Trek and a lot more to do with promoting how developers can now put geo-location files (KML) on mobile phones. Way down at the bottom of the page are links to plot sci-fi related locations on Google Maps (see them here) or Google Earth.
Much cooler is an AFP article, Google builds bridge at Star Trek cult convention, about how Google's booth will feature a mockup of the Enterprise bridge (TOS, probably, rather than TNG or STE. Don't know the acronyms? Then you don't care which bridge it is). The main viewer will access Google Earth, which sounds pretty cool.