Undoubtedly an old discussion which I, as a newcomer to the (autodidactic) study of ON have not yet heard:  How is "v" pronounced?  Is it as "w" per Barnes, or "v" per Gudlaugsson.  Regionalism?  Chronologically dependent? 
 
Or since I'm not likely to ever discourse with any Vikings (except Palo Alto High School's), can I pretty much pronounce it whichever way I want? 
 
Thanks,
   Alec MacLean