Sneakers (OLD school hacking, great movie)
Enemy of the State (not hacking as much as spy stuff)

These two are among my favorites.

And not really 'hacking' but with regard to online activities and trying to track a criminal:

Untraceable

Good movie.

Not a movie, but '24' has some great stuff.

Don

Alright! Thanks guys.

I'll watch Sneakers and Die Hard 4 tonight 

Then I'll check some of the other movies tomorrow when I find time.

I've been wanting to watch '24' but I always end up watching something else lol.

ZF

Sneakers is a little older, but it is exactly about a small pen testing company long before the phrases 'pen testing' or 'ethical hacking' came on the scene. They also make use of a red team where each member has a specific skill: a social engineer, an electronics/telecom guy, a computer expert, ex-fed, etc. Good stuff.

Don

Tron Legacy looks awsome!  I cannot wait for it.  The Comicon trailer was just put together by the production company, it is not going to be in the movie.

Chicks with tatoos rock, it looks interesting.  Foreign movie too.

Sneaker's was excellent!  
Wargames is classic, its like a must see for any geek I think!
Hackers was, entertaining.  
Firewall and The Net were also great.  The Net was great for the ID theft aspect.  

As far as TV, Leverage is a great series and Burn Notice is another entertaining one.  Think I like most about Burn Notice is the narration of why he is doing certain things.  Most of it is made up but plays out to look true enough.  Leverage has some great scenes, like when the rewind at the end of the episode to show you some of the hidden tricks they used to pull off the job.

Oh and Sneakers is in the Netflix Instant Queue