Early attempt, I thought it was finished but it doesn't look so now...
Any comment/suggestions?

Looks really good to me. I would make the actor names a little bigger and put them over the TT. Perhaps even use the same style as the TT, first name black, last name under it with the same gradient colouring as VEGAS.
On top of the slot machine at the bottom of the front you could put a critic quote, looks a little empty like that. Last but not least I would add a screen shot to the top of the spine.
That's about all what I can think of.

update... regarding quotes, I cannot find anything (neither on imdb or usual sites..) if someone can help!

i think it looks pretty nice.. good job

Just invent something. I hardly ever use real quotes.
"The Break-Up meets War of the Roses." - David Ansen, NEWSWEEK
That would already do it or my quick creation:
"Successful turn-around of usual rom-com genre with superb chemistry between its two leads!"
-USA TODAY

Looks good papperone, I'm liking this and I think a tag or critique would balance up the front nicely.

Thanks both...
thorn, the first tag is already used in the back ;)
I'm thinking is use the second one you provide, or move the one from the back...

Nice work papperone. A quote on the front would balance things nicely as the others have pointed out.

wow man nice work