Few things are more challenging than writing about writing. So fraught with pitfalls, solipsism, outright silliness (although the silliness can be charming). Admittedly, my attempts at ars poetica tend to be rather dismal, at best. Maybe because I'm not very good at humor writing...
These folks, on the other hand, have got it goin' on:
ars poetica: poems about poetry, updated daily
A Body of Work
13 hours ago