HL2 Entities

Davideo59 quite rightly pointed out, that you can get information about the attributes of the new entities in the Hammer 4 help file...
VERC will be presenting an Entity List in the future.

I just found out that HL2 Retail is available in Australia on the 17th and if it is anything like the launch of HL1, then the doors of the major stores will be open at midnight on the 16th...which is disappointing, as I thought those who had perservered with Steam might actually be able to play the game before everyone else...