Actually, this style of playing is quite popular now - nothing unusual about it. For similar artists, check out:

Don Ross
Andy McKee
Tommy Emmanuel (a little more melodic and less slapping)
Raul Midon
Kaki King
etc.

You'll find that each of the top end acoustic guitar companies have at least one guitarist in this vein that they use as endorsee.

This slap-oriented style is one branch off of the bigger branch of acoustic guitar playing known as 'fingerstyle'. If you google 'fingerstyle' you'll come across a huge assortment of acoustic guitar wizards.

-Scott