Thought it might be interesting to put the six JeeNode versions / designs next to each other. It nicely illustrates my progress in learning PCB design, and making some trade-offs and pinout choices over the past 2.5 years:
JeeNode v1:

JeeNode v2:

JeeNode v3:

JeeNode v4:

JeeNode v5:

JeeNode v6:

We’ve come a long way. And I think it’s now time to call this final v6 design… it!
I’d love to hear a quick breakdown of the differences between each revision, and the reasoning behind the changes. It’s nice to see the evolution, but we could benefit from your knowledge learned also.
For a history of the changes, see the JN v5 PDF. The v6 only has minor tweaks, as described on the wiki.
It’s all a continuous set of trade-offs. Several decisions were driven by the other members of the JeeFamily – SMD Kit, Carrier Board, Bridge Board, AA Power Board, etc.