To begin with, but as half of the devs, myself included, were sight-impaired, the symbol-heavy syntax became a real drag and we transitioned away from it.
In the end, what we ended up with was our own library written around libevent, which could interface with awful's plugins. As a bonus, it was much, much faster than awful. It even beat out nginx in some situations.
http://wiki.call-cc.org/eggref/5/awful