Ask Slashdot: Best Connect Scheme For a 2-ISP Household?

c_petras writes "I just had DSL installed (a 19,000 ft run — Woo Hoo!) to act as a backup to my regional WiFi connection. How should I configure my home network so I don't have to swap the cable from one ISP's router to the other to maintain a good connection? Is it as simple as getting another router and plugging the two ISPs in? Is there a more elegant solution that would not require the use of three separate boxes and associated wall warts?"