From windows blog:
When we announced Windows 7 had RTM’d on Wednesday, I posted that OEMs would receive the RTM code within a few days. Well, it’s been a few days! Earlier today, a handful of OEMs arrived in Redmond to pick up their RTM code.
For more info please read http://windowsteamblog.com/blogs/windows7/archive/2009/07/25/oems-pick-up-windows-7-rtm-code-today-in-redmond.aspx.