Information is available at the Beta Home at: http://www.solidworks.com/sw/support/subscription/betaprograms.htm
You will find the download files at:
Go to the download section. The version defaults to 2009, but you can use the pull down to select 2010.
If you are interested in finding out more about 2010 as the information becomes available, watch this blog, or sign up for our mail list in the right margin.