Guys.Yes there are a few kits available for the 08 right now.
Here are a few that I know of.
Eibach pro kit springs $199.00 at tirerack.com
Vogtland lowering spring and the Vogtland MAX lowering springs both $225.00 at F2cars.com
Ford Racing Performance Parts springs and dampers (I don't actually know the exact name or part number to this suspension kit but you can PM derekzoolander and ask him what the part number is and how much it was.)
and if you are willing to spend the money, there are the H&R Coil over Suspension kit (which is adjustable) $1,199 at focussport.com but this is more of a track set up so if you are not planning on AutoXing your 08 I suggest a cheaper option.
There might be more out there but these are the ones I know for sure will fit all 08 Focus. I am actually going to get the Eibach kit next week so let me know if you want some feed back on that particular kit.