I'd have to disagree about Hack-a-day. As a reader, while I agree that they produce no original content and their signal to noise ratio isn't perfect, they manage to pull together many items in one place that I would have to search dozens if not hundreds of blogs to find. I actually follow three tech blogs: Hack-a-day, Hacked Gadgets, and the Make blog. Together they save me a boat load of time.
As an occasional blogger myself those sites are invaluable. Post a tech story or project and send it to all three. If one or more of them repost your item it'll appear in another few dozen blogs and the final hit rate can be amazing.
I posted a positively -stupid- simple article about building a one-zone sprinkler timer. The first couple days it got a hundred or so hits. I sent it to Hacked-Gadgets who posted it. Hack-a-day and Make snagged it from there. In short at the end of one week the article had more than 20,000 hits, and by the end of the cycle (3 weeks) it had received more than 50,000. Looking at the site stats I found that it had been picked up by 30+ blogs plus stumble and a couple other referral sites. Now, several years later and thanks to Google, that article STILL gets a couple hundred hits a month.
As for the black background ... *shrug*... It's a matter of taste.