Just tried this plug-in. Really need it if possible, except I can't get the mass activation/deactivation working right. I have a network of approximately 3500 blogs. If I click Activate All for any plug-in, it thinks for awhile and then finally (after about 10 seconds) goes to a mostly white screen -- the admin sidebar only remains present.
Does this plugin attempt to mass activate in one shot or does it queue requests for each blog (ie 5-10 at a time)?
I have a feeling it could be a server configuration thing, but I'm unsure due to the lack of feedback.