You really should have a logo in place rather than "are you bitten by the startup bug" Nothing extravagant, just a simple logo saying StartupBug with your slogan being "have you been bitten?"
Also aim to make the site less 'diggish' I very much like the whole social news aspect but change the interface a bit, possibly change the blue boxes to another shape or make them square. Also, instead of "bugg it" try putting "bug it," or "bug me" something that differentiates you from digg.
I have no idea what the numbers mean, or what "bugg it" is. Is it a rank of some sort? Try making it more clear. Otherwise, I found the site design very pleasant and intuitive. My only other suggestion would be to space out the different types of green links. Like, instead of using the pipe character '|' to seperate them, consider just using a bunch of which I think will look more readable and less busy.
Also, keep in mind "digg it" is a pun, since to dig something means to like it; it's slang. But even that is kind of dumb to me... anyway, "bugg it" makes no sense.
Your opening post made it sound like it would be quite a usefull site, then I took a look at it and realised it's just a poor digg clone.
On the design front it's functional but the colours are flat and uninspiring. There's also far too much whitespace that it dominates the screen, especially when commenting on an article as your tag cloud drags the page out when there are no comments leaving you with a screen that is almost totally blank. It just looks bland and rather amatuer'ish.
As for the functionality, as I said earlier I wasn't expecting a digg clone. From your description of the site I was expecting original content, advice and links to resources. I'm also not sure why I would go to your site rather than digg which already has a business section and a large community, you don't appear to be offering anything different.
Whilst I guess that's not the type of input you wanted I do think that you have a good idea, you just need to re-think how you're going to present it and what you are going to offer. As it currently is I don't see it doing that well, sorry.
Digg is more of tech news and general news, while it fails to cater to niche segments the same way it caters to the tech segment. Some VC's turned entrepreneurs blog saying they are done with digg as it doesn't offer them anything useful anymore.
There is a lot of room for niche crowd-sourcing human news aggregators like digg and startupbug is one of them catering to business/startup segment.
Just a thought though and open to debate the future of going niche.