Some ideas based on what we have done with clients – we’ve found some really good unified gateway appliances that you can hook up to one SAN site. You can take a snap copy of your production data/volume so you don’t disrupt your current environment. Then you do WAN replication to a similar appliance at the warm DR site across town.
Another option is to replicate you SAN data to a local (permanent or temporary) appliance, and mail or drive that appliance to the warm DR site. You can then do a WAN replication sync between the current site and the warm DR site to match the change/delta in data during the period the appliance was in transit.
Sometimes transfering data via truck is faster and cheaper than transferring it over a network line!