Reading Todd Hollenheads .plan he's said the demo will be put together for a release shortly after the USA retail release (Aug 3rd). Mac OSX and Linux versions will follow ASAP, but the linux version will not be a retail box (?).
There is not going to be a DVD version, because of the costs involved of having two masters.
And on the subject of cost, why are you all bitching about a $55 price tag? The normal UK price tag for any PC game release is around £40 ($74) not £29 ($55).
Count yourselves lucky.
I've pre-ordered DOOM3 for £25 ($46) which is the cheapest new release I've bought since DOOM2 was released, at £20 ($37).
The whole "HL2 is better" crap from retards like Mr. Bleh, is just hysterical. If they want to be such fanboys, they should wait for the game to be released to make a genuine comparison, but the rational thought is a bit slippery for these individuals.
My philosophy is that DOOM3 is sex and HL2 is chocolate. Why should we choose? Have both!
There are 10 types of people in this world. Those who understand binary and those who don't.