Because technologists "get it," they typically try to push organizations to implement identity management, but these same people aren't the ones with the political clout needed to pull it off.
Even though Sun Microsystems is providing additional tools to ease the adoption of identity management, don't be fooled into believing that Sun has the magic bullet. You need to understand that grass-roots efforts and technical acumen will not carry you through in this case. You'll need adequate funding and authority--in other words, buy-in from upper management that extends beyond signing the purchase order. Without organizational buy-in, you're doomed from the start, no matter what the technology.