You can do this as a solo effort with MindManager. You could invite a few people to your Mindjet Catalyst account to add their comments but they would mostly be MindManager users only. With MindMeister you can set up a map which can be edited by anyone as a no cost Wiki Map. If you want to edit the map below, you will need a free (and limited) MindMeister account.
There are customers for all the mind mapping applications but not all the potential customers can access all the applications or justify or need all the features of the more sophisticated ones. This is not about deciding which is best overall but which is best for your needs. Obviously I am interested in how MindManager stacks up against the rest.
Lets see what happens: