Updated use case diagram

Hi community,
It seems like no one was able to join the call this morning so I just went ahead and updated our use case diagram with Vicki's suggestions. Perhaps the weekly interval is too frequent for us? If that is the case, we might consider switching back to every other week so as to encourage attendance.
In any case, the general "shape" of the use case diagram may be structured enough for Marta to take to F2F as is if we don't make much more progress before then. I definitely think that the written document will tie in nicely with the diagram as it can be an elaboration of what is depicted.
Thanks,Colleen