While there are many conferences in the US you could attend I've been to most of them and the one that is not only worth every cent but also has some of the best music and technology teachers ever is the Christian Musician Summit .  This is put on by Matt Keys and Bruce Adolph, the guys who do the Christian Musician Magizine and Worship Musician Magazine

Seatle, WA - Nov 13-14, 2009
CMS @ Overlake Info, Seatle/Redmond WA Featuring Matt Redman also Brenton Brown, Paul Baloche, Lincoln Brewster, Doyle Dykes and many more...

Buffalo, NY - May 14 & 15, 2010
CMS @ The Chapel, Buffalo NY

Hope to see you at one of the events.