Aperture Dèjá Vu
It's a non-linear map which have many paths to take and reach the end. The point is, that you play a map one time and you are happy. Then you have a little break in Portal, because there aren't any new released maps for some time. But the answer is here: play the Deja-Vu again, but choose a different path with different puzzles. You can choose freely the way that is going to lead you to the end.
Features so far?
* Level design similar to the original Portal style
* Level difficulty is balanced, like the original
* New Overlays like "D?j? vu" "HARD" etc..
* Jumping pads
* Gravity
* Red lasers
* Crushers
* Moving box-droppers
* Floor lifts
* Bridges
* Non-linear
* Easter eggs
* New "GLaDOS" voice
* New blue suit
More Information?
If you want to know more about this mod, feel free to go into this site
http://www.moddb.com/mods/aperture-dj-vu
Here you can read all about this mod and about us who working on this. You can also see screenshots, videos and aslo download our DEMO.
Have Fun!
-Skinnycap
-Tuoppi
Again, I can't wait. 
Skinnycap wrote:
* New Overlays like "D?j? vu" "HARD" etc..
OH BOY!
pretty good... it is a bit tiring going through all the possibilites, and there r only four... it would be tedious to do all of the ones in the proper mod id imagine...
one thing: emancipation grills into and out of each chamber doesnt actually do anything... it doesnt get rid of portals in the room u were just in...
other than that, the chambers r good, only one irritated me... :p
monkeyman wrote:
just downloaded the demo and played it...
pretty good... it is a bit tiring going through all the possibilites, and there r only four... it would be tedious to do all of the ones in the proper mod id imagine...one thing: emancipation grills into and out of each chamber doesnt actually do anything... it doesnt get rid of portals in the room u were just in...
other than that, the chambers r good, only one irritated me... :p
I know that the DEMO map is kinda bad and that voice we used there is not that one we gonna use in the real one etc..
But the real one is much better, i think i gonna release it next month:D i hope.
watch here ---> http://www.moddb.com/mods/aperture-dj-vu/images/new-face
I don't know where the gray hair comming from, is it possible to delete them or something?
Anyway, Keep up the good work. 
1. I like the site.
2. I wanted to show off a little because of my beta-tester status for this mod. No really, look on the ModDB page.
Anyway, I really can't wait for the mod. But my question over at ModDB was never really awsered. But it's a secret to the public (at its topic), so I think I'll email.