I just saw a really cool WPF twitter client that I think is developed by the Herding Code podcast guys HerdingCode called Witty. (or at least, I see a lot of those guys usi
After you install Tortoise (separate SVN client not required), create a new empty folder for the project somewhere and right click it in Windows. There should be an option for SVN Checkout. Choosing that option will open a dialog box. Paste the URL you posted above in the first textbox of that dialog box and click "OK".