I met Saeed Khan at a TPMA meeting where I was a memeber of the panel discussion on agile and product management.  Saeed and I disagreed about a few things, particularly around the importance of the distinction between releases and patches to software products.  He forwarded me a few links from his blog which I found very interesting.  Again, I don’t completely agree, but I think it is worth while for people to see these ideas and judge for themselves:

http://onproductmanagement.net/2008/11/09/5th-element-to-agile/
http://onproductmanagement.net/2008/10/30/agile-pm/
http://onproductmanagement.net/2008/10/16/the-value-of-scrum/
http://onproductmanagement.net/2008/09/28/agilescrum-reality-check/