Now there is a new version extras-devel/extra-testing.

This version allows you to disable the screensaver (menu item "Disable Screensaver"). But it won't be done automatically. However push-it now stores most of the customizable settings. That means if you have disabled the screensaver once, push-it will know on the next execution and will start with disabled screensaver. The screensaver will be disabled as long as push-it is running.

All versions including this have the bug, that if the screen is of, push-it still takes 7-15% cpu time and therefor draining the battery. I still need to find out how to fix that.