If you ask Deci, he wouldn't respond because he's been doing that 'real Life' thing lately.
If you ask Bill, he'd say that Dubbilex needs to get off his lazy arse and make a hive.
If you ask me, I would say that I'm getting to it, damn it :p
We've hit the fundamental limit of the Half-Life engine, brushwise, so we've cut down a lot and have rebuilt a lot. In conclusion, if I get really inspired and Bill does too, we could have this done within the month. And even then it will be an alpha, and as such will require a lot of testing and balancing. Oh we're just getting started - spending a year making the flipping map is only the first part.