yup we have a fail over strategy for 2.2 which has worked well during the blackout of NYC Last year (If I am not mistaken) and upgrading to 4.0 as we upgrade the environment in 1 month's time. Pure Domino Environment!
We still use it until today just in case. My Manager and I came up with in our company and RIM has taken this from us. This DR implementation is simple, just think, remote SQL Server which is used as a failover for the HQ Sql Server.
I dont mean to hold out information but this has already been patented and it involves some manual labour initially (also when the HQ goes down and the DR needs to come up). Please let me know and we can discuss---consultant work for this?