If you can't see it today or the clouds are dense, try this for the next 6hrs ....

Transit of Venus to be Monitored by Spacecraft | Venus Transit Skywatching | Space.com (http://www.space.com/16009-venus-transit-satellites-space-views.html)

It won't happen again for 105 years.

Cheers.

Here's another link to NASA's live coverage:

NASA EDGE @ Mauna Kea, Hawaii: Live Webcast Streams (http://sunearthday.nasa.gov/webcasts/nasaedge/)

If you get the NASA Channel, it has live, if a bit geeky, coverage as well.