Blogs are often ridiculed for their lack of any real reporting, dismissed by some as just an endless commentary feed.

That’s not the case — and here’s another great example from Minnesota:

From the kitchen table in his tranquil suburban neighborhood, Brodkorb for the last year has used his blog “Minnesota Democrats Exposed” to launch a furious political assault on Franken. He’s labeled the former comedian and liberal commentator a “mean-spirited and un-Minnesotan” candidate who’s running a “desperate and ridiculous” campaign.

That’s routine stuff in the world of political blogging, but in the last two months Brodkorb has scored two direct hits that have the Franken campaign reeling. Brodkorb scooped the traditional media by detailing extensive bookkeeping problems in New York and California that ultimately prompted Franken, this week, to pay about $70,000 in back taxes to 17 states.

The stories have knocked Franken off balance as he prepares to take on Sen. Norm Coleman, in what’s expected to be one of the most expensive and toughest-fought U.S. Senate races this year.

Rather impressive.