You need to align your panels a bit better, but it's a good start!
Its pretty good but for me the column which i think was supposed to be on the far right side was in the middle...useless. I also think the design is a bit boring.
Well I've been taught to use 3 main colors. For you, White, blue and maybe another shade of blue would enhance the look of the site greatly.
Maybe some graphics &/or a larger variety of colors would do nicely...
well first let us know what kind of website like category you wana start your web site
Its the most painful thing in the world - takes too long to download, annoying, hard to prevent it opening, hard to control etc.