Can't say I am all that familiar with the IISP. Couldn't get that first link to load. Second link worked with no probs....Seems interesting. Although, if you are looking for some other good security training/certs I would definately look into any of the SANS GIAC certs or even the Cisco CCSP.
Both of which are (IMHO) are vastly more indepth/technical than the CiSSP.
Not that the CiSSP is bad or anything. : )