We'd like to announce the premiere of 7 Rivers Talk with Bob Burull on KQEG-23 on Monday, March 1, at 5: 30 p.m., featuring guests LaCrosse Mayor Matt Harter and Station Manager Rick Wilson.   Station KQEG-23 is a newly renovated UHF station that will pass approximately 75,000 households through off-air and cable networks covering all of LaCrosse, outer suburbs, and rural cable stations.   7-Rivers is the name of daily 5:30 p.m.