Where are the Auditions?

I'm a high baritone (currently with Savoy), and always seem to be hearing about auditions after the fact - for example, I missed out on Flashpoint's JC Superstar auditions, simply by not knowing where to look. It just seems that there are more musicals occurring than theatre.asn, filmnet etc have on their audition areas...
Any advice on where to pick-up on auditions? I.e. off-line?

It's not like my agency's any help - I'm with Bold aka the "Agency formerly known as DG" :P