First read this comic:
Cat and Girl: Large Mediums
Now check out the links:
Candlepin Bowlers Forum
But don't bother signing their petition to save the Local TV Show, "Candlepin Stars and Strikes", it got canceled anyway:
A bad split? Channel 50 puts candlepin bowling 'on hiatus'
You didn't think I would let you get away without meme of the year, tagging:
candlepin tags on flickr.com
I guess it's not suprising that a search for "candlepin" on del.icio.us turned up nothing (as of this writing). Within a system of folksonomy, you only get to see what people using the system see.
(Oh and, of course, there's a Wikipedia page on Candlepin Bowling, but that's like asking a pedant to explain a joke).