Multi-Homing Your Home Network?

Jens asks: "For some time now, I have been looking for an affordable solution to multi-home my little network. I have both DSL and cable feeds and it would be nice to combine them with some basic load sharing but more importantly with some failure protection for both incoming and outgoing traffic. My DNS provider allows for round robin access to my two feeds for incoming traffic load sharing and to dynamically change my DNS entry which could be used for feed failure protection. Are there any Slashdot readers who have tackled this problem? Seems like there are quite a few people out there in my shoes but nobody seems to have found the magic solution."