Hi deckrider: by #3 being optional I meant that if you don't attach any build queues to the schedule the build would technically not be parallel and only the default build queue would be used for building the projects. As for the local repository question, you don't need to setup separate local repositories for each build queue as building of inter-dependent projects is not yet supported (this is for future enhancement) and there's also the limitation of 'A project group cannot be built multiple times simultaneously' as specified in the requirements doc: http://cwiki.apache.org/confluence/display/CONTINUUM/Continuum+Parallel+or+Concurrent+Builds
Wendy, deckrider: Shift + click for selecting build queues seem to work for me.. hmm, could be a browser problem? May I ask what browser you're using? I'm using Firefox 22.214.171.124. I'll also try it in IE to see if I can replicate you problem..
For the queues page, I think the update from scm is executed during the prepare build phase by the prepare build task executor (which IIRC was added for the transient state feature) so the project(s) is/are not in any of the checkout queues. Only after the update from scm does the project(s) get added to the build queue so that's the time when it would show up in the Queues page. On a related note, I think you'll be able to see the checkouts in the Queues page when you initially add projects to Continuum..