I was forwarded a very nice blog entry on the value of mentoring. This article highlights how the mentor gained as much from the experience as the mentee. I haven't worked in a corporate HRD role since 2000, but I remember encouraging mentor relationships often.
Now, why was I forwarded this blog entry? Because it was written by a software developer that worked on the Instructional Spice team mentoring our lead developer. Pretty cool!
http://www.dgrigg.com/post.cfm/05/16/2008/Instructional-design-gets-spiced-up