Waiting for Team Fortress 2?
I was too until yesterday afternoon! An independent mod team released Fortress forever recently!
http://www.fortress-forever.com/
It is very faithful to the old Team Fortress classic for Halflife.
The old maps are all there too! only with some major improvements on the graphics.
The dustbowl map for halflife 1 was really ugly in my opinion… now they made it into a great looking mining town.