Yeah, that thing about the blót is difficult to explain once one leaves the "old homelands". First of all, just because a new religion comes along, it does not mean that the other one disappears. Sometimes, it does, sometimes the both exist alongside eachother, and sometimes the two mingle. In this case, people have bloted well into recent history in the way it was done in the past, and those blots are documented in writing by contemporaries. You would not realize how many of the "old ways" never stopped unless you actually lived in a Nordic country for some time (and even then, sometimes not!).
Second, Snorri and a few other autors do give good written evidence of how this was done, and there is not a great disparity between how, say, Tacitus (don't quote me on that, cuz I can't find the passage right now) and Snorri, even though they are hundreds of years apart. That's a good indication of the written documents actually being reasonably accurate, and then one has to use ones sense of logic in removing the things that are obviously scewed to make "them barbarians" godless and un-christian.
Third, there is no dogma in Asatrù. It's about your relationship with whatever god you choose to speak to on that day, and what you wish to speak about. I.e., is your way of speaking to your mother or your teacher or boss the same as your friends way of speaking to his? Do you tell someone to fuck off in the same fashion you ask them for a cookie? What I am trying to say is, that there isn't a "right" way to do these things. What is right is what feels right for you. Historical precedence, yes, but not a correct way, so don't ever let anyone tell you that. The group with which you worship, if you even choose to worship with one, should feel like a comfortable fit for you. Asatrù worship in the old days was done at home, except for big blots like the one in Uppsala, which was a rarity, and it was held as part of an Althing. It's a lifestyle. Make sense?
I totally agree with the last post you wrote, Nodferatu. No argument from me there - that's exactly what I meant when I said that Snorri didn't necessarily skew the texts on purpose. Master Adam, on the other hand, is a whole another story...His aim in some parts was to make the Norse heathens look bad and stupid.