Half-Life2.net posted an interview with Gabe Newell. Surprisingly talking about Half-Life 2. He mentions some information on the three release versions, physics and mod aspects among other things. The release date happens to be one of the topics that were not covered.
Q: The Steam delivery method is sure to be very popular for the nearing HL2 release. Are you confident that the server infrastructure in place will be able to handle the massive amounts of bandwidth required by the thousands downloading HL2 via steam?Really. Makes the Steam release/service even more appealing considering the recent news on some of its 'features'.
GN: This issue scares the pants off of us. Every time we think we understand the aggregate demand that can be created by the community, we find that we have underestimated it catastrophically.