You can just download it straight from the home page. Including the source code.
Head on over to our forum to read about it, as this includes some new economic changes basing coin production on actual cost to produce in electricity rather than "nothing", which should eventually lead to stable prices needed for a working online currency.
This will likely be the last release on the "bitcoin code" as we are moving to a nearly 100% new code base to spread SolidCoin to as many platforms as possible and rewarding nodes for handling transactions.
If you are a business or use the RPC, please be aware that the bitcoin compatibility layer is now gone, you will have to use the new sc_ replacements which mean you need to specify amounts in integers and the wallet you want it to occur in.http://solidcointalk.org/topic/524-solidcoin-v204-released/http://solidcointalk.org/topic/523-new-economic-changes-in-solidcoin-v204/