From Campus Technology:
“It is true that the group identified support as their major concern about adopting Sakai. But I’d bet it would be a major concern if we asked about adopting WebCT (www.webct.com) or Blackboard (www.blackboard.com), too.”
This has interesting comment from a variety of US institutions about the challenges of supporting LMS whether commercial or open source. Many of the challenges are similar and some comments favour open source systems because of the greater level of local control.