Time limits are the headache of correspondence chess. Sigh. I, too, am
spoiled by Richard's PBEM server. The Omega Chess tournament there is at
G/180 days (30 days vacation with notice allowed), and that G/180 gets
counted to the minute and second by the central server.
Obviously we don't have that option.
Suggestions for how to best count a G/XX time limit are welcome. I'd like
to see a year maximum on the games, and expect to see more small variants
than large for that reason (and the fact that we've had a lot of small
variant design contests!).
An absolute time limit of Y days for any individual move, with one warning
and a notice provision for vacations, might also work in lieu of the
above.