If you wanted to go all-out, and this would require a lot of planning without Jeff, I think it would be a better idea to go by region rather than time zone. Why? Well, having the events at SFGAm and CP slights the people in the southern parts of the zones.
Region would be a better plan. Have an event at SFNE or Lake Compounce for the Northeast, SFoG or one of the Florida parks for the Southwest, SFoT for the South, CP or SFGAm for the Midwest, etc., etc.
And hell, I don't even know why it has to officially be done. Why not just get test the waters to see if anyone's interested in meeting up at a park in your neck of the woods, set a date, spread the word, and hope for the best. (The only drawback would be trying to get ERT or something like that.)
The possibilities are endless.
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Matt Lynch
Co-Webmaster, Kennywood Boulevard
http://kennywood.coasterbuzz.com