So you want to upgrade from Resque 1.x to 2.0? Here's everything that you need to know.
Rake was replaced with Thor. Rake tasks are still supported and backward compatible, they're deprecated and will be removed in 2.1 Resque provides
resquebin file instead which you should use for running workers and other Resque-related stuff.
$ QUEUE=high,failure rake resque:worktranslates to
$ resque work -q high,failure. Check all available tasks by running
Resque::Workers#initialize now takes a client as an option. This manages its connection to Redis.