I've had the priviledge of meeting 2 different nappy lovers (both female).
The first Chell, who lived in Hatfield, she was 20 I think... we chatted for a while, and she decided to come see me, we just basically hung out, watched a bit of TV, the whole nappies and t-shirts type thing. That was great, had a couple of cuddles etc...but I wouldn't advise you take it any further (i.e. sex) on the first time you meet....
I was gutted when I lost contact with her (changing of mobile numbers etc)...that's a point...if anyone knows her and knows how she is...can they let me know? She used to post on Diaper Girls forum.
The second, a lady who lives in Portsmouth, who was late 30's I think...I drove down to see her...she kept eyeing up my nappy and stuff...kinda scared me...lol...so that didn't work out....
So yeah...all in all...meeting up with other nappy lovers is great fun...but it always go down to the type of person you're meeting as opposed to whether they wear nappies or not...remember that...
Good luck if you meet that guy though.