Is it possible to take a track that has multiple clips with multiple overlap points and have them all crossfade at the overlap points?  I know i can turn on auto crossfade and it will do it as i edit, but is it possible to do it all at once?  The only work around i have found for this is to select every other clip in the track, turn on auto crossfade, and nudge them right then left.  It works, but its a little odd and i feel like theres probably a real way to do it that i just cant find.  thanks!

I don't think this is possible. I've seen people do it in Logic, but not in Sonar. Generally speaking, with auto-crossfade it's rare that I'd ever need to do this, so perhaps what you want isn't that common?

There is Process > Apply Effect > Crossfade, but it's destructive.
 
Another way would be to apply fade outs to the earlier set of clips, and fade ins to the later by using quick-grouping to effectively create crossfades in two steps.