Few of the people I follow regularly recently turned to the “daily blogging” routine and I just stopped reading them. Not that they started writing for the sky and mountains or anything – I just can’t catch up with everything, and the new content sounds like a magazine article rather than a professional opinion or review.
Unless your work is full-time writing or R&D and your blog is your very top priority, please don’t do that. There are too few examples of successful daily bloggers (I won’t point fingers, I can think of three or four myself) that don’t do that professionally or cooperatively at a multi-author blog.
I agree with most of what Mike Schinkel wrote about daily blogging.
If SEO and direct profit isn’t your main concern, start a few different blogs focusing on the different subjects to respect your readers. Don’t forget all those cases when you Google for something and you get lost in all those hundreds of unrelated posts and forum threads that have nothing to do with what you need, and what would have happened if those people didn’t post them? Especially when they don’t provide any real solution or just repeat the same news that hundreds of other websites and blogs wrote about already.