hey dude, use the search bar please, its just that we get a lot of people coming on and not bothering to search b4 they ask something, makes the forum messy ^-^
And in answer to your question... Yes there is. It's located in the file archives. (It's a tad slow atm though, so probably not what you would consider usuable... depends how patient you are I guess )
No harm done. Since "PDF viewer" can't be searched for with the normal site search we kind of have to expect that people will have a hard time finding info for it.