You can elect to turn off auto-vacation in your settings.
30 days in one lump sum sounds nice, but what happens when you use it all up in the first 6 months and then have 0 days for the last 6 months of your year?
There are pros and cons for either way to do it, but personally I prefer the gradual accumulation of days.
I also play on ICCF - there you have vacation time of 30 days a year.
On chess.com my vacation time is down to zero (mostly because of the auto-vacation function!) and therefore I will lose every game in 2011. Simply because I will be on holidays for a week or I have too much work.
Simple solution: Give every member 30 days a year - cancel the 2 days per month and cancel autovacation.
Comments?