http://nightly2.sakaiproject.org:8085/portal
To test Basic LTI - do Worksite Setup / new - step through the wizard and add Basic LTI to your site. Once in the site, go to the Basic LTI tool and press the "edit" icon - and off you go.
You can make a mess of things - no need to cleanup - in a few hours it will be wiped out and rebuilt. It is a great way to feel the raw power of a Sakai administrator :)
/Chuck
P.S. The password has the same number of letters as the user name. It will help optimize your guessing. Also I think that it is the same account/pw for the uPortal demo distribution.