Although it’s been a while since I last worked on this project, things are continuing to move along. I finally assembled the Ladyada XBee adapters and successfully passed a message between the two XBees.
So, I’m not the best solderer and the first adapter I worked on suffered from an overusing tip on my soldering iron, which made heating up the solder with the tip of the iron next to impossible. There were also some issues (that remain unresolved) in terms of configuring the XBees, but thankfully that step seems to be unnecessary (at this point anyways).