Hey Alex, not sure if you've logged into your Twilio account lately, but we reduced prices a couple months back so inbound calls are now $0.01/min, SMS is $0.02/msg, and phone numbers are $1/domestic or $2/toll free. We've yet to see someone actually blow through the whole $30 in trial credit, but if you run out and need more just let us know at help@twilio.com

Also not sure if you've seen this, but you can pick from English, French, German, and Spanish accents here: http://www.twilio.com/say