Facility wide DR/Continuity

to whoever said ...

F5's if you like commercial solutions

F5s if you like expensive commercial solutions .....

Those with a less bulging wallet may wish to speak to the guys at Zeus Technology (http://www.zeus.com/) who have a lot of experience in the area and a more reasonable price tag.

Contact me off-list and I can give you some names of senior techies there to speak to.

disclaimer that you should research your products .... it may be that
for your particular application/environment/business model/whatever F5
may be your tool of choice)