Sorry for the off-topic reply, but anyway:  It will allow you to verify OTR key fingerprints for contacts.  The idea is that someone can store their fingerprint(s) with a namecoin name, and then they can tell me that name (which is easier than a fingerprint) at an in-person meeting or some other side-channel, and I can just tell OTR to check whether my contact's claimed fingerprint actually matches any one in the name I remember.

@CIYAM:  Thanks, I got the email now.  (But can only log in later, since I'm not at my home computer now and don't have the GPG private key here.)  If HTTPS can be used and doesn't require GPG, why isn't it used by default?  (Although I have to admit that I like the idea of GPG encrypted credentials.)  And yes, at first I copied my key with some blanks / newlines at the end, which caused an error about the CRC being wrong.

When I tried signing in with https://nameid.org/ as OpenID, basically nothing happened (no error, I was just shown again the form asking for the OpenID, with the input field reset).  Some other providers also have problems with this site (Sourceforge and the Bitmessage forum are the ones I know about) while StackExchange for instance works fine, as do the http://test-id.org/ tests.  I have to admit I don't know what the problem is (or if I can fix it), I'm using the php-openid library for the OpenID related stuff.