It seems like "labs" sites are all the rage these days. Adobe has their popular labs site, and even firms like Big Spaceship have started a labs site. I just found out today that Comcast has been running their Comcast Interactive Media Labs since late 2005 without much fanfare.
The thing that surprised me most was that a lot of the cool interactive projects coming out of Comcast were developed and/or started in their media lab. For example, The Fan 3.0 was launched and won People's Choice at FlashForward 2006 in Austin.
Keep tabs on the cool happenings at Comcast here (http://labs.comcast.net). And if you have a Comcast internet account, be sure to sign in and take advantage of the awesome interactive offerings.