Ping.fm mobile site (WAP) having authentication issues

I've been trying to access the Ping.fm mobile site from my cell phone's WAP browser for the last two days to no avail. Whenever I try to access "m.ping.fm" I am taken to a page that looks more like the home page for the full website rather than a watered-down mobile mode, and whenever I try to provide my login credentials several error messages regarding security certificates surface. I tried accessing m.ping.fm on my computer running Firefox, but the browser displayed a warning splash page asking me if I was sure I wanted to access the site due to mismatching certificates.