Venus begins transit across the face of the Sun tomorrow at 5:04p.m. Transit lasts 6 hours. Get those colanders out for a great view. If you plan on missing it, the next time this happens is 2117. I think I shall plan on viewing this one, assuming we don't have cloud cover.
For more info: http://www.cosmosmagazine.com/news/5635/countdown-transit-venus, http://stardate.org/nightsky/june-2012-venus-transit