SNPA (Nordish.com) is now located on Apricity, here:
http://www.theapricity.com/snpa/
You may also be interested in the work of Richard MCculloch, who collaborated with the SNPA intensively and has picked up the torch of men such as Wilmot Robertson in defending Northern European genetic interests. You can find his excellent web site, which contains a great deal of information regarding Physical Anthropology, here:
http://www.racialcompact.com/
I also recommend you take a look at Karl Earlson's research, particularly if you're interested in ancient history:
http://www.white-history.com/earlson/index.htm
Of course, nothing is better than having an actual book to read. If you ever see a copy of Dr. Carleton Coon's
The Races of Europe, which is long out of print, grab it! Dr. Hans F.K Günther is also a great resource. If you don't speak German, there is an English language translation of his
Racial Elements of European history, which can be found rather cheaply at places like abebooks.com. Richard McCulloch's four books -- The Racial Compact (1994), The Nordish Quest (1989), Destiny of Angels (1986), and The Ideal and Destiny (1982) --are available for purchase through his site.
One last note: I believe the SNPA's most recent incarnation is not its finest. Much of the material from Günther was phased out, for example; this may have something to do with the Draconian laws in Europe. You can see its previous incarnations at archive.org