Hello my Name is Nate. I am 17 years old and i found out about PLA while surfing the technology section of Temple Of The Screaming Electron (the greatest website ever). I learned a little more through further research on wikipedia (and also the url for you website
)
I became interested in phreaking when i read an article on TOTSE about making a collect call either to a ghost line somewhere in california (and impersonating the owner of the non-existent telephone
My own mediocre attempt at humor has been highly amusing to myself.) or just calling collect to the phone booth next to you.
BTW Audacity 1.3 (freeware sound editor for the noobs out there) can generate DTMF tones and/or tones at your specified number of hertz. don't know if thats still useful.