Brendan Benson -
http://www.brendanbenson.com/
A bit more 'rock' than your typical singer/songwriter with just an acoustic guitar, but still very much worth checking out. Two albums out are Lapalco (Folk Singer is the best song) and The Alternative To Love (Spit It Out is the best single) .
Seen him twice, once at glasto and once locally where he headlined. Very enoyable concert and highly recommended.
His recent project is with Jack White in The Raconteurs. They've been jamming for a few years and finally put out the recent album that has been doing very well.
You can listen to songs from The Alternative to love here -
http://www.brendanbenson.com/news.php