Visually the style looks prity good as does the whole layout. The whole index page seems to have been completed (which is rare these days) and replacing all the stock vbulletin images is a big plus.
However, I have noticed that you didn't insert a title in your logo? I would suggest giing the logo some kind of title and possibly a sub heading just so the whole index area is complete.
I noticed the text on th smaller & large buttons are aligned to the right. I would possibly center them in the blue area of the buttons to give it a more centralized/organized feel to it.
Overall, the style has a nice feel to it and you've seem to take the time to replace the images which is always a good thing but there's just a few things left to tweak/finish to get that more completed style.
Goodwork and goodluck with your site.
