Just wanted to make it clear that I'm not a quality blogger either, but an aggregator (i.e., totally sponging my content off the sweat on others' brows).
Mike Masnick is one of the more prolific bloggers I read, but he still can't touch Steve Benen at the Washington Monthly, or Digby at Hullabaloo, or, frankly, any of several dozen very prolific political bloggers I read, and I'm sure there are some mommy bloggers who put these people to shame.
But the real question here is do you value quality or quantity? Who's the better author, Isaac Asimov or Thomas Pynchon? Barbara Cartland or Isabel Allende? Zane Grey or Ernest Hemingway?
Mike does a nice job of putting out a lot of quality product. Would acknowledgement from Guinness make him a better blogger? I don't think so.
I've been blogging since 1999, and daily since 2004 but I can't touch Mike's 38,000 posts because my average posts are much longer and work out to about a million words a year. Others are still more longwinded.
Guinness also fails to recognize originality. Yes, you have to be creative to make news items speak to larger issues like Mike does, but what about those who create wholly original posts each day? Doesn't originality count for more than putting a spin on someone else's news story?
I've been making my living as a business writer since 1988. Over the years I've noticed that those who make money writing are rarely the best writers, just the best at selling themselves and getting paid.
I have more respect for the "give it away and pray" crowd than I do for the slicksters whose business skills give them an edge over better writers. Much more respect.
When I started up City Pages blogging community in 2003, I wrote an anonymous front page blog that did exactly what you are proposing. Each day's early morning post was a mix of the best of the net and just about every linkable page of new City Pages content that had been posted since my previous blog post.
I thought Village Voice Media should have a website dedicated solely to driving traffic to other VVM sites, but mine was a very small voice in a very large media corporation where all the important people were obsessed with 2) being important, and 1) not being laid off.
VVM changed their site architecture since then, but I'd be glad to email you some samples of what we were doing. City Pages kept doing this concept after I left, but changed the concept radically a year or two ago.