Regarding desktop team status and GNOME 3.7, I don't know the status either, but as I did see a ticket for updating nautilus to 3.7.90 (LP: #1130746), I thought I'd file one for system monitor too, and it's even easier, and it does not depend on anything not available in the repos.
Regarding desktop team status and GNOME 3.7, I don't know the status either, but as I did see a ticket for updating nautilus to 3.7.90 (LP: #1130746), I thought I'd file one for system monitor too, and it's even easier, and it does not depend on anything not available in the repos.