I and several other Internet acquaintances can affirm that Ásatrú is alive and well in 2006, despite the best worst efforts of Charlemagne, King Olaf, and other nasty types.
The links you posted, with the possible exception of Theodism and the Northvegr section on Finnish mythology, are a family of beliefs that all point to the same pantheon of gods. Regionally there are slight differences in names, such as Wotan and Oðinn (*waving* Hi, Dad!).