Does anyonoe know what they are doing for blow off valves for the '07 2.0T Jetta's???

 

pretty sure they are still using diverter valves.
not certain though

 

You get a thing called a spacer... forge makes it... it fits between the stock DV and the turbo and it vents the boost atmospherically
I have one on my car... Most people like it some peole call it ricer

 

never heard of that but i do know that the stock ECU in these cars expect the extra air to recirculate so when it doesnt because you release it atmospherically (via a BOV or what electricme is talking about) That extra air isnt coming in and it can cause the car to run rich (too much fuel for the amount of air) and throw Check engine lights. If you alter the ECU via something like a port tune, chip, or whatnot, you can get past it because the air/fuel ratios will be chaniging anyway and it can compensate with the programming. there are times when people release to atmosphere without seeing any problems but the car isnt necessarily running to full potential.
If youre looking for teh BOV whoosh sound, buy a cold air intake and it can be heard from the DV. other than the sound the BOV is not gonna do much for you anyway.