Good work, and congratulations on your victory.
As for the map... the [spoiler]WCC fling puzzle[/spoiler] is still my least favorite part. I don't entirely hate it, but it seems to me like the button seems like it's too far away, and unless you place you portals
perfectly, with masterful timing, getting everything where it needs to be is borderline luck. Unless I'm completely missing something about the map, this one seems way off the difficulty curve.
Also, I had a problem with the WCC "falling" off of the buttons, i.e., if the cube is on the edge of the button, it will often randomly bounce off, creating general havoc for the player. In the aforementioned puzzle, this was especially annoying - we finally manage to couple cube and button, only to have the door slam closed milliseconds before we fire a portal, forcing us to repeat the process. Definitely not map breaking, but if you plan to update again at some point, this could be something to fix.
Now that I'm done pointing out my problems with this map, the good things: the anti-gravity fields are great, and the new particle effects are a great addition. You made great use of them, to the point where they never felt overused or redundant - every puzzle had a unique way to defy gravity to reach out goals. [spoiler]Using the WCC as an elevator was especially cool. I remember hopping on, wondering if this would actually work, and then slowly rising up through the shaft. Awesome.[/spoiler]
The non-anti-gravity puzzles were good as well. They didn't feel as well thought out as the rest of the map - very standard "get X from A to B" type stuff. Not that it wasn't fun, and given that it wasn't the main feature of the map, it's forgivable, but still, for all the innovation you brought in with anti-gravity fields, I expected more than [spoiler]simply putting a button on the ceiling[/spoiler].
Overall, I loved this map almost as much as I loved my Aperture Science Weighted Companion Cube. Excellent puzzles, great new ideas, and high caliber map design make it a solid map in all respects; being able to make an infinite portal loop where the cube is forever falling
up makes it a clear winner.