The just released 1.5.2 patch for strategy game StarCraft 2 has activated the Arcade feature much awaited by some. Arcade, if you don't know, has been in beta for some time now, and offers a one-stop-shop for browsing fan-made maps and mods, complemented by a community rating and review system.
To access the new feature, simply click the 'Arcade' button in the Battle.net menu and get started.
Another notable change in the patch is the ability to download patches and such during gameplay. There are also a variety of fixes.
Check the full notes here if you're interested.