Look at Wild_Doogy's codes on page 9.

${addr wlan0} for WiFi IP address
${addr gprs0} <--Not sure if this exists, but if it does, it should be some IP-equivalent for gprs internet.
${addr usb0} for USB-internet IP address (takes some fiddling, but you can get internet through the USB post)
There should be one for BlueTooth but I don't know what it is.

Speaking of bluetooth: Wild_Doogy, did you figure out how to make Bluetooth internet show up in Conky?