After his defeat of Alexander Grischuk today in an exciting game, Vishy Anand holds a half point lead, with 5.0 points, in the World Chess Championship over Boris Gelfand. The official crosstable and pairings are at the Chess Mexico site. All the players have one more game tomorrow, kicking off the second half of the tournament, before a rest day on Saturday.
The live and replayable games are here.
Edit: Susan Polgar reported that "the energy level here is quite high."