Bikenj,
You are probably familiar with
http://www.crazyguyonabike.com/ . Judging from your posts, you are a pretty good writer, and have the potential of developing an interesting journal. With a relatively inexpensive digital camera to help document your travels, you could use your "spare" time to write and post your journal complete with pictures. Quite a few folks seem to be able to post daily even while on tour. I'm not sure how they do it, but many seem to mange to find the time.
While I have not used an e-journal, my wife and I did keep our blog site updated regularly while on a long tour, and it ate up a lot of time. It was a commitment we made to our family, before we realized how much time it would actually take. My wife still documents the day's travels in a handwritten journal. Journals, regardless of the format, are a nice way to go back and refresh memories of your ventures.