First there were loggers, then joggers and bloggers, and now … moggers? Seriously, moggers are bloggers who have joined the MOG Music Network. I'm not completely sure how it works — it seems you have to write about music and agree to run ads on your blog — but I found something interesting on MOG the other day: a post about Music Fatigue Syndrome (MFS), a condition that occurs when you play a song so often you get so sick of it you never want to hear it again as long as you live.

A mogger named "aclason," whose photo on the site implies he's a laid-back guy, suggests two types of prevention for MFS: Control your listening, and listen to live music. "Unlike recorded music," he mogs, "live music is unpredictable, transient, and ephemeral. The brain never has time to lock down and make overly-familiar the performance."

Yet another good reason to go in search of jazz, the least predictable of all live music. (Except perhaps the Wordless Music series at the Southern Theater.) In that spirit, here's a full weekend of jazz worth checking out and why.

Friday, Sept. 12: Nancy Harms with Dave Karr and the Tanner Taylor Trio. I like Nancy Harms's voice very much. I have heard her sing only a few times briefly; Arne Fogel has called her up on stage during his shows at the Times and the Dakota. She's sultry, she swings, and she shapes her words as if they taste delicious, like fresh strawberries or seared scallops. Listen on her MySpace page. The Dakota, 8 p.m. ($10).

Saturday, Sept. 13: 7th Annual Selby Avenue JazzFest. Spend time outdoors while you can. This family-friendly neighborhood festival earned a Best of the Twin Cities nod from "Minneapolis St. Paul" magazine last year. Start at 11 a.m. with Dick and Jane's Big Brass Band, check out the vendors (food, crafts), ride the free trolley up and down Selby, and be sure to stick around for the John Raymond Project at 4:15 p.m. Raymond recently graduated from the University of Wisconsin-Eau Claire. People are talking about this passionate and serious young trumpeter. Hear him on MySpace. Headliner Jason "Malletman" Taylor is a vibes player and protégé of the late Lionel Hampton. His set starts at 6 p.m. Selby and Milton, St. Paul. Free. View the schedule here.

Saturday, Sept. 13: Stephanie Nakasian and the Hod O'Brien Trio. The AQ is mostly an instrumental jazz club, so when Kenny Horst books a vocalist, expect someone special. Nakasian has worked with Pat Metheny, Hank Jones, and Horst's good friend Roy Haynes; she is often heard on the syndicated radio show "Riverwalk." The lady swings and scats. Pianist O'Brien has played for Chet Baker and Oscar Pettiford. The Artists' Quarter, 9 p.m. ($15). (Nakasian and O'Brien also perform on Friday, Sept. 12.)

Sunday, Sept. 14: Earl Klugh. I was never a big fan of Klugh, suspecting he was a bit too smooth. Then MinnPost's Britt Robson wrote good things about him earlier this week. You might be soothed, you might be surprised, but you won't get MFS. The Dakota, 7 p.m. and 9:30 p.m. ($40/$25). (Klugh also performs on Monday, Sept. 15.)

Sunday, Sept. 14: Enormous Quartet. If you go to the first Earl Klugh set, you can make the Kitty Cat Klub in Dinkytown in time for the big sounds of the Enormous Quartet: Chris Thomson (saxophones), Park Evans (guitar), Joey Van Phillips (drums), Chris Bates (bass). Prediction: Good stuff. Kitty Cat Club, 9:30 p.m., no cover, ages 21-plus.

Find jazz calendars online at Jazz Police. Click on Twin Cities, MN in the black menu bar at the top.