Source SDK available through steam

Valve has announced that the Source SDK Tools are now available through Steam.

"A precursor to the release of the full SDK, which will be released shortly after Half-Life 2 is made available, the Source SDK Tools release offers a comprehensive toolset for starting production on Source-based MODs, including Hammer, XSI EXP for Half-Life 2, compiling tools, the Source Model Viewer, documentation on programming, modeling, building materials, and more"

if you get the sdk and have questions about stuff I have set up a thread to ask things here: http://mapcore.net/forums/viewtopic.php?t=1406