I am now a registered fan and am looking forward to this new project!
It's about time

the DVDs must have been in your household for at least 24 hours before you watched them - shocking

no no I know I'm just pulling your leg, you are so lucky to have been able to see all the W&G things at once

And only 5 and a half months to the movie too

I love everything about Wallace & Gromit from the storyline, animation, to the looks the characters give in the punchline moments especially Gromit - priceless!!
Gromit says absoloutely nothing * but he conveys so much

It really is amazing how much that they manage to convey to us through the angle of his brow, the position of his ears, and of course more often than not he disappears behind a newspaper rolling his eyes

Sheer genius in my opinion.
Ed if you feel totally lost you might want to track down the Chicken Run film at your video rental store (it's been out a while now so it should be cheap)
http://www.aardman.com/chickenrun/(have a fish around the site and look for the trailer, I can't send you a direct link as I don't know how to get one, sorry it's quicktime you see)
It's not Wallace and Gromit but it's done by the 2 main directors (Nick Park and Peter Lord)
It's the only full length movie these guys have done so far but I love it - and I think you will love it - one of the characters is an RAF chicken (just don't question it Ed), and the cleverest chicken in the "farm" is a Scot (so you'll have to listen hard to understand what she's saying

) - and one of the star voices you will recognise is Mel Gibson, he has the main character - and is a Yank (a road island red) too. I think you will probably REALLY enjoy it especially with the RAF references and flying... well I can't say too much without giving everything away. Let me know if you can't find the Chicken Run at your video store and I'll see what I can do.
One thing you will notice is that the animation of the Chicken Run is slightly cleaner looking than the trailer looks for Wallace and Gromit. (I am sure you noticed some fingerprints left on Wallace and Gromit in the earlly episodes) I think they have gone back to a slightly grungy look (as seen in the trailer) to make sure people know this is claymation and not 3D modelling of characters

* I have been corrected, apparently 2x in the adventures he makes yelps, but the only one I remember is when he is whizzed around by the drill in "A Grand Day out".