To be honest, recommend that they get someone experienced with HA/DR in to do the design at the very least.
Otherwise, start with this:http://www.amazon.com/Server-2005-Availability-Experts-Voice/dp/159059780X/
and tell your boss that you'll need a few months and some test hardware to play around on.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability