Telltale has posted its initial coverage of GDC in their most recent blog entry. Most of what they report has already been brought to your attention by the vigilant JP. However, they also have (a scan of an ad containing a picture of) the cover of the March issue of gamedeveloper, which as promised displays a brand new Sam & Max drawing by Steve Purcell.
Here's hoping that Purcell's apparent willingness to draw inordinate amounts of amazing Sam & Max feature art extends to the cover of the Season 1 CD release. ...Oh! And in the blog Telltale also teases that Sam & Max will be making a "special appearance" at the GDC Awards ceremony. If there's any luck they won't behave themselves.