Delorme is really raising the innovation bar! It's refreshing to see companies like this listen to the community and continue to pump out cool stuff. Even with all of its compromises, I love my PN20. I skipped the -40 but will seriously consider the -60w.
The wireless capability is pretty cool, but it only talks to other 60w units. The usability in the real world would probably not be all that great unless you happen to run with a group that has them. For runners/bikers it's pretty neat, but for 4x4 guys, well you aren't normally looking for each other if you are within 1/2 mile (the range).
The best thing about Delorme is how they take high tech ideas and make them accessible to the average person. I think that is why the SPOT device has been so successful (not to diminish the great marketing, but it is a pretty cool device). This is a perfect partnership IMO.