>} 1. NTP should get intimate enough with the BIND DNS code to get the 
>} TTL along with the A RR, and should requery the name/address mapping 
>} for all peers when their TTLs expire. The TTL is the maximum time 
>} that such a mapping is guaranteed to be valid. This necessarily means 
>} that NTP should be keeping peering relationships with host names 
>} rather than host addresses...
>
>Recent versions of squid have an internal host name to IP address cache
>that works this way.  It also does asynchronous lookups to avoid blocking
>the entire process.

indeed.  i believe that most irc servers will also be found to have an
implementation of async dns somewhere in them.  i know mine does.

-- 
|-----< "CODE WARRIOR" >-----|
codewarrior@daemon.org             * "ah!  i see you have the internet
twofsonet@graffiti.com (Andrew Brown)                that goes *ping*!"
andrew@crossbar.com       * "information is power -- share the wealth."