Fanmail

You can find Michael's LOST fanmail address in this thread, as well as info on what to send/how to send it:
michaelemerson.proboards.com/index.cgi?board=general&action=display&thread=107

Michael is outstanding at responding to fanmail. On the Fancrazy board here, you'll find many threads where people have posted their autographs and responses to letters they have sent to Michael.
michaelemerson.proboards.com/index.cgi?board=fancrazy

Also, the board has collectively sent letters and questions to Michael. You can find links to all of those projects here:
michaelemerson.proboards.com/index.cgi?board=general&action=display&thread=85