Who are the 500lb gorillas?
Interwoven, Sitecore, Tridion, Ektron, MOSS
If you couldn't use Umbraco what would you use?
If price was no object maybe Acemix, looks impressive and extensive but expensive. Maybe Drupal, the key is to understand what each "CMS" is good for, including Umbraco, because each is often good for very different purpose.
If what you really want is a nicely skinned full featured blog, WordPress is great.
If you want a simplistic blog with basic skins you might use Tumblr. If social networking is core to your site then Drupal may be the best choice.
A lot of discussion on Joomla. It's simply a very different approach. It can give you something pretty good very quickly but iit can easily become a nightmare to manage and extend. Provides no real integration between packages, there's no enforced consistency between all the tools available as add-ins, a customer can and will easily reach a point where Joomla can't meet their needs even though they were enamored with it at first on how "quick and simple" it was.
Umbraco is great in that it's very extendable, generic, has a great foundation, etc, and it fits the need for may purposes, but everything needs to be considered for its strengths.
Wordpress is a great blog, but people keep trying to make it into a CMS and it can create a mess with a lot of hacks and workarounds, a poor user experience and limitations on the extendabilit
Cited "worst experiences with CMS tools" included Tridion, MOSS/SP. Niels, "Sitecore is what made me want to create Umbraco". Some defense of Sitecore from a person who uses it and really likes it. It's pretty expensive (think 90,000 was mentioned!) but very robust in features and UI. Some good debate over it, there are obviously people who like what it offers, value the features they sell, and see it as more "Enterprise". Whether we all agree with this or not, perception is reality.
Drupal cited as having the most similarly passionate developer community, and probably being the non-Microsoft tool people might try if they had to use something besides on Umbraco.
Interesting how many big CMS's focus on the importance of having complex workflow and sell based on that as a differentiator, but people barely use that feature and most customers who implement complex workflows turn them off in 6 months or less, or they just hand the approval passwords to the authors or someone in the "low-rank.
Niels: "Umbraco can do workflow. If you need to check that box in an RFP you can check the box. It has the pieces in place to enable the workflow they need or be extended, at the farthest end you could even integrate a 3rd party pure workflow product."