is never winter nights another sequel to bg?

Nope, in fact it has nothing to do with it. It's using an entirely new 3D engine to boot.
I suggest you surf over to http://www.sorcerers.net/Games/NWN and read all about it.

Going along simlar thoughts... Why does BG2 say that you will be able to import you char into NWN? They are not realated, have way different rules, and stats are going to be much different as well. I don't know exactly how that will work.

I'm with you there. BG2 is 2E and NWN is 3E. I ended BG2 at 17th lvl, and I assume I'll start NWN at 1st lvl. I think when they put that into the 'loading' screens of BG2 they were not thinking straight.

In ALFA the only thing you would import is the name and the picture. Some other 'non vaulted' worlds may let you import anything.

NWN will not have a brand new engine. Its actually based off the Omen Engine used it MDK2. Bioware has tweaked and enhanced it, renaming it Aurora.

I meant "new" in comparison to Infinity Engine.
But yea, the engine itself has made it's appearance in MDK2 first.