RSS to Email tools
Getting some of your feeds by email gets you a true push capability from RSS without requiring any other tool you already use: email.
The new kid on the block. Free trial but no free option (very cheap yearly option, though). Get as many feed as you want up to near real time.
Free for daily updates up to 5 feeds. Quite expensive for any other options.
Is this service still alive? Not updated for 2 years or so.