I recently went and saw the film and loved it.
I fell in love with Nolan's directing back with Momento (and to date is still one of my all time favorite movies) and Inception has the same type of feel to it. If you missed Momento back in 2000, I highly recommend giving it a view (keep in mind you will likely watch it back to back the 1st time - budget your time accordingly).
I agree that a second, and third viewing may be needed to get the full feel for the story. Although Nolan's other works (Follow and The Dark Knight) didn't have the same "whoa I need to see that again!" power, his movies often linger in my mind long after the initial viewing is over.
Inception is on my 'Buy it the day the Blu-Ray hits' list. Nolan's commentary will probably create as many questions as it answers though...
EDIT: Add Link
College Humor - Extended Ending
Edited, Aug 6th 2010 1:02pm by RaideroftheBlade