42 tries (not a lot 4 me,hehe). Looks really complicated and I spent about 30 tries, complicating it even more. LOL. In the end I found TWO (very slightly) different paths, both resulting in 395 moves. VERY good level, anyways. :) (& it reminded me a bit of Forgive me, by Raszlo).
You added some nice tricks but there's a part I liked much better in the previous version.
EDIT : yes, David. He wrote on IRC "I published another level with no record his time :p".
O.o you published my "PP1 Pipelining"?. Funny :p.
https://dl.dropbox.com/u/74076095/pp1pipelining.png
EDIT : That's Ok. I wouldn't have published it myself anyway.
2012 Updated Comment: Do not like much "maze" level with so many holes because it gives me too much the impression of an out of control mess. I saw a comment telling about the last move being so important. In my case, that were the first moves... LOL
Very good level, seems impossible, at first. For me, it was a question of order, too, which put me 4 off. After I solved that problem, I solved the level, as well. 62 tries.
I haven't seen such a hard Tetris be4. :) (30 tries brought me only to 2 off - will be back). Edit (after more than two years): I had enormous troubles here, besides having forgotten my 2 off. 117 tries!