Talk Radio Network syndicated host Michael Savage and the Ann Arbor, MI-based Thomas More Law Center have filed a federal lawsuit against the U.S. Homeland Security Secretary. The suit claims that a recently released intelligence assessment by Napolitano’s department, cautioning against potential “right wing extremism” by returning military veterans and other citizens, violates the civil liberties of combat veterans as well as American citizens by targeting them for disfavored treatment due to political beliefs. Savage says DHS has violated the first and fifth Amendments by “attempting to chill free speech, expressive association and equal protection rights.” The lawsuit, which was filed in the Eastern Michigan U.S. District Court, further charges that Napolitano’s DHS “encourages law enforcement officers throughout the nation to target and report citizens to federal officials as suspicious right wing extremists and potential terrorists because of their political beliefs.”

See him? He’s right there on the side of that WLAC/Nashville van. While Limbaugh may have been there in spirit, WLAC and Radio America nationally syndicated host Steve Gill was there “live and local” speaking to thousands who turned out for this week’s Tea Party in Music City. Gill reports he actually spoke at three different Nashville-area tax protest events on April 15, addressing an estimated 20,000 Tennesseans in his combined appearances.

FOX News Radio host and commentator John Gibson joined KFAQ/Tulsa morning host Pat Campbell at this week’s “Tea Party” attended by thousands of “Green Country” residents who were “TEA’d” off, saying they are “Taxed Enough Already.”

Talk Radio Network syndicated Watchdog On Wall Street host Chris Markowski braved 80 degree temperatures and blinding sunshine to speak to the crowd at this week’s southwest Florida “Tea Party.” The event was promoted by WTMY/Sarasota and held in the community of Lakewood Ranch.

The  NAB Show in Las Vegas, which opens tomorrow (4/18) and runs through April 23rd, promises to be a virtual ‘United Nations’ kind of media event with broadcasters attending the confab from all across the world. The NAB reports registrants from more than 160 countries and reports they will host the largest-ever representation of international pavilions inside this year’s NAB Show Exhibit Hall. More than a third of the 1500 exhibitors participating in the 2009 show are from outside the U.S., along with global content professionals from around the world. The NAB says more than 28,000 electronic media professionals attended last year’s annual show. You can get more details and registration information at www.nabshow.com.

Department Of Corrections: In yesterday’s story on John Madden’s retirement from his NBC-TV NFL gig, we neglected to mention that Madden will continue to host his Daily Madden radio reports on KCBS-AM & FM/San Francisco. Madden, who lives in the Bay area, said his mom — also a Northern California resident — called him yesterday wondering if she’d still be able to hear him on the radio. “She listens to me every day,” said Madden appearing live this morning on the CBS Radio all-newser. “I told her not to worry, that I would still be on the radio on KCBS.” You can hear more of what the legendary NFL coach and Hall of Fame broadcaster had to say about his retirement at www.kcbs.com.