For example Intel isn't meeting again until January 2010.
This may not actually happen- they always say stuff like that and then end up meeting anyway. I was told that May was the last Intel board until January, and as far as I know, there was one in June and July. So take that with a grain of salt.
Supply and Intel meet at the ends of the month.
SNA/NFO/SWO meet around the 15th of the month with results coming out around the 25th to the end of the month.
Not necessarily. According to the "schedule" from this year, the boards for all of those designators were supposed to meet on the 15th. I don't know when they actually met, but Intel must have met before the end of the month in May because... (see my next comment)
Supply and Intel usually sent their results around the 1st/2nd week of the following month.
I got my Intel pro-rec on the 28th of May, exactly one week after my SWO pro-rec.