Theres an upcoming fan made web seires happening called 'The Freeman Chronicles' that im really looking forward too. Chariotdrive and Infectious Designer are working together to make this series happen. Some exsamples of thier prevoise work are Enter the Freeman, Byeond Black Mesa, And Half Life orgins. The series will be taking place place between where Freeman reaches the surface and gets to the lambda complex.
I feel that this will help me pass the time asi wait for HL3... whenever it gets here.
Half Life Origins: http://youtu.be/HHGJlxLoUhs
Enter The Freeman: http://youtu.be/7GJ1CQ8A9cE
Beyond Black Mesa: http://youtu.be/OOrH5tfWorg
http://www.thefreemanchronicles.com/