I have been completely unable to mine to Slush's Pool. I've tried with multiple ISPs (hoping the gateway/route would change), but any attempts to connect to http://api.bitcoin.cz:8332 or http://api2.bitcoin.cz:8332 (and logging in with the credentials for one of my workers for slush's pool) results in a 502 (Bad Gateway) error.

I'm using cgminer, and I'd like slush's pool to be my failover for when my workers can't reach eclipsemc.com.

Is this a new problem, or has this been going on for a while?

The ISP's I have tried are Time Warner Cable and Verizon Wireless.

Any help is appreciated.