There are wiki areas on BALUG.
Could potentially make a page for tracking potential speakers/presenters, and dates they can't make, could or might be able to make, or have confirmed to make, etc.
Maybe a simple table matrix, rows with potential speakers/preseneters, columns with meeting dates (e.g. month no. in hexidecimal), and a key code for varous letters in the table, e.g.: C - Confirmed R - Reconfirmed P - Possibly can make (not confirmed) T - Tentative - will probably confirm, to be finalized N - can't make that date ? - unknown if available or not for that date
Quoting John Mark Walker:
Is there a wiki area on balug.org? Could we make one?