Activities/Toaster/Develop
I hope this collection will get updated along with the resources discussed on our email list.
For Ubuntu machines until the Ubuntu Sugarteam make more progress here is the advice I got on how to run Sugar with Virtualbox.
Reading python code of activities in any Sugar environment, on an XO, using Sugar on a Stick or using the above virtualbox environment will be helpful in learning how to create our own.
http://en.flossmanuals.net/ActivitiesGuideSugar - the best resource so far.
http://www.youtube.com/watch?v=gAJq02rCA8s - an excellent PyCon 2008 Activity creation overview
I found a video series that led me to this video of Nicholas Negroponte from TED
http://catb.org/~esr/faqs/smart-questions.html is a useful resource yet from a very focused viewpoint.
http://wiki.sugarlabs.org/go/Activity_Team/Resources
http://wiki.sugarlabs.org/go/Activity_Team/Creating_a_New_Activity
Disassembly and some electrical tape is required to prevent damage to the wifi cards of the XO 1.5 we received.
http://spins.fedoraproject.org/soas/ - Sugar on a Stick (SOAS) is now an official Fedora Spin based on Fedora 13 instead of F11 or F9.