It's not the game of the day in my opinion, as its significance for the medal standings at the Olympiad was nil, but Rustam Kasimdzhanov's quick and overpowering win over Veselin Topalov was an impressive and noteworthy game. So consider it noted, and have a look at IM Andrew Martin's quick presentation (it's mostly a theoretical overview of the variation, with bonus coverage of a game Tregubov-Savchenko, but that's largely because Topalov fell apart so quickly!) here (near the bottom of the page).