Hi Mike
They are known as Progens or china clays, they are nice chips but the link you posted the price is a little high.
Google "progen poker chips" and you should be able to find them for less.
Here is a link to the same chip but with a different mold for 8¢ less per chip.
Poker Chips - 10 Gram Poker Chips
Most people call this mold the "sprint mold", the progen's have the large key mold.
Keep in mind that these chips are sold with out a label, no denominations and a step below a true clay chip....i.e. paulson, ASM & Blue Chip but they are a lot of bang for the money.
One last thing....have you checked all the classifieds here?
You can almost always find a deal on a set here
Poker Chips - Sets - ChipTalk.net - Poker Chip Forums
Good Luck
Duh...EDIT...here is a link to a member selling these chips with labels! for a very good price
WTS Private Cardroom Tournament Set made by Palm Imports - ChipTalk.net - Poker Chip Forums