They better have their servers ready for 150% capacity every single day of the year. True, only those of us who know about disboards and allearsnet are the diehards to call 180+10, but if even one morning @ 7:00 am their system is down or bounces you out and tells you to try again later, forcing crazed mothers and trip planners to call CMs, Disney will never hear the end of it. They need to make it akin to Opentable.com. They need to have every restaurant online, the hours, the times available, the number of tables (tops or covers), menus updated monthly, virtual tours of the restaurants' FOH areas, the ability to print off all your confirmation #s in a .pdf format, etc.
For further security reasons, only guests with reservation #s to stay at a Disney resort should be allowed to make these @ 180+10, and they should be made to put down a CC# with a 24-72 hour cancellation policy. This would discourage double-bookings (Opentable.com prevents you from making any a second rez within a two-hour radius of one already booked). These are things Disney should do. Having said that, I don't think it will be nearly this organized.