I thought I'd answer a few of the questions, as they've already been answered officially before, or they were in the featurelist, etc.
@ meerschaum
The purpose of the "dongle" (AFAIK some code in the BIOS of the A1 that OS4 detects and allows itself to be installed/run) is for a number of reasons, take your pick:
* The smaller the number of configurations that OS4 can be installed on, the less development and testing work that needs to be done. OS4 isn't likely to set the world alight, so it makes perfect business sense to get as large a return on as small amount as possible. This isn't meant to have a go at Hyperion, I'm not saying they're cutting corners in QA or anything like that.
* Presumably Eyetech and Hyperion have or will have some kind of partnership, and as there's more money in selling hardware than software, both companies can have their fingers in both pies.
Future Amiga "next gen" hardware won't necessarily be "derived" from the current A1 as you put it, it's just a case of limiting the number of configurations it will run on. If Eyetech/Hyperion decide to go with a completely different chipset and say the G5 in future, then Hyperion will develop the OS to cater for that as well.
Regarding "stability" of all the current possible configurations, I'm sure they won't get them all perfect first time. As you don't like the A1/OS4, I'm sure you'll expect them to be perfect first time or expect a grilling by you on the amiga.org forums.
@ shIva
Your first four questions - the answer is no as it's not a unix box, nor is it intended to be aimed at that market. Your networking question is answered yes from the OS4 featurelist. The rest of your unix related questions, no.
"Will be system be documented?"... not sure what you mean by this.
@ bloodline
re: DHCP, of course it will, it would be a bit of a cack TCP/IP stack if it didn't :-) See the OS4 featurelist.