Nice!
I used
http://whatismyip.org/ so far because all it gives out is a text value of your IP, although it misses a return at the end so using it with on cli isn't the nicest experience.
However, added options of ifconfig.me like ifconfig.me/ua are really cool (and because of /ua I don't have to use something like whatsmyuseragent.com any more).
Too bad for some reason ifconfig.me is slow for me... hopefully just a temporary glitch...