Oriental Brushes
This site has a good and thorough introduction to the brushes for Chinese/Asian Calligraphy, and guess what, its in English! XD
For those of you who wants to start, this is a place to look at.
To buy brushes online, if you search there is many shops:
Example:
http://www.goodorient.com/goodorient/product.php?productid=25836&cat=94&
This one has a reasonable prize, don't get ripped off and buy a whole "pretty" looking set, just get the individual brushes, it's cheaper that way.
And you don't really need the ink stones and ink sticks to start the practice, all you need is ink that will not smell bad. lol~ I recommand Jap