Here is a business seminar source that I recently learned about (and it is connected to the University of Nebraska!): NU Skills http://www.nuskills.unl.edu/ . A class that would be of particular interest to librarians is coming up next week: Presenting with Power (it should be the first class listed on this page https://nuskills.webex.com/nuskills/mywebex/default.php?Rnd8635=0.7188375822167214 ), and it only costs $39 ($45 if you register within 24 hours of the course time and date).