Something like this has been on my writer's bucket list ever since middle school, when I read "Screwtape" for the first time. I've even got a novel halfway planned for it (from an aborted attempt at doing Camp NaNo) but I have something else I want to work on at this time. Hope you get a few participants though; both "Letters" and "Diaries" have a long, long tradition in novel writing, and I would love to see a few more get written.

...
Regards,
Eric Fretheim

"It is perfectly okay to write garbage-- as long as you edit brilliantly." ~C.J. Cherryh

"Success is the ability to go from failure to failure without losing your enthusiasm." ~Winston Churchill

“No, writing 50,000 words in a month is normal. You are not crazy. This is not insane.” ~Teri Brown