libevent1 0.8-2 (ia64 binary) in ubuntu hoary

An asynchronous event notification library
 The libevent API provides a mechanism to execute a callback function
 when a specific event occurs on a file descriptor or after a timeout
 has been reached.
 .
 libevent is meant to replace the asynchronous event loop found in
 event driven network servers. Currently, libevent supports kqueue(2)
 and select(2).