Here's an update. Before I went out of town I printed out the threads in this post and used them to help me organize what I wanted to say in a letter to my wife. I got back in town last night and stayed up late to write the letter. As MPT suggested I said a lot of the things that I'd stated in this post, after which I basically went through her other suggestions and put them into my own words. I wrapped up my letter after midnight and left it next to my wife's car keys. This morning when I woke up she had read the letter - as well as a few other things that I hadn't planned on.
I had also printed out several pages of posts, mainly from low desire spouses, that I was considering giving my wife to read, although I hadn't made up my mind yet. After wrapping up my letter last night I forgot to put away the printed versions of both my posts and the other posts. My wife found them this morning next to the computer and read through them. She wasn't mad, but she did say that she felt funny about me posting all of our problems on the internet for the world to see. I can certainly understand her feeling that way, and I would have expected it. I did let her know that I haven't even given out my first name, to which she said "I know". This clued me in that she had gotten online and read some of my posts as I didn't have the user names printed out. Needless to say, knowing that she may be reading my posts may limit the effectiveness of this message board for me in the future. However, I don't plan to stop posting, at the moment anyway, because the support that I've gotten on here has been so helpful.
Although I didn't intend it, the fact that my wife read some of my posts may really help our situation. I was relieved that she wasn't mad, and if nothing else she probably has a much better feel for what I'm going through, how much I truly love her, and the effort that I'm putting into fixing our problems. I'm hopeful that she'll be encouraged to work on them with me, but I suppose only time will tell. Thank you all for your advice - I'll keep you apprised of any developments.