Not such a major update, but it looks better. I don't think I will use it too much though, I don't feel like advertising a site on a preloader when I have my own site for which I need advertisement :P.
All this is a very clever thing, now I'm not even sure whether this preloader was made for Newgrounds advertisement or just to give a gift to all artists who can't make a preloader of their own. I think it's more of the first one than the second. :)
Many people are happy to have a Newgrounds preloader and always use it, even for small tests, because they think it's 'cool' and 'professional'. But I don't think all those people realise they are advertising Newgrounds for free. ^^
I also noticed this new Newgrounds tank was also added to the post textarea bacjground, it looks nicer and more detailed. What I first noticed about it is the shading - way better now.