Here are a couple of decent articles about filtering and lane-splitting in the news, including one from the Wall Street Journal (thanks Paul):
Wall Street Journal WSJ.COM Motorcycle Lane-Splitting Could Move Beyond California
If you are in favor of splitting/filtering, prepare to be disappointed by the comments in the WSJ article. There are some really timid motorcyclists out there. The video on the WSJ article is absolutely worth watching. The article pitted a splitting rider vs. a non-splitting rider on a 1 hour (caged) commute while discussing the advantages and disagreements about splitting.
Being the conservative bastion that we’ve become, Minnesota is not part of the conversation. We should be, though.