Some interesting information about using UNIX abilities to achieve extended function from a distributed authentication environment, specifically laptops to cache (memory) login information when disconnected from the network.
http://blogs.techrepublic.com.com/opensource/?p=127
I think the ideas here are more interesting than the implementation suggested. If you can cache the identifiers, why not do that across multiple LDAP stores, (even from multiple security domains, domain controllers, and AD forests) into a single directory. You couldn't disconnect your laptop, but you could achieve reduced or single sign-on, especially for external applications. The identification step (or search) of the LDAP store would be much faster, once you have the DN the credential check would be sent back to the corresponding LDAP store.
If I have confused you, just let me know... I will be happy to fill in more details of where my mind is going on this after reading this article today....
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