hmm don't know if I've met any other INFPs before...
Other types:
INTP - my husband's type, we get along great and really click together
ENFP - my brother's best friend, get along well with him. He's fun to talk to and do things with. He can occasionally be annoyingly immature with bragging (he's 17), but if you just let him know something annoys you he's never offended and always cuts it out. He's a godsend for my brother (ISFJ).
ISFJ - father, brother and mother-in-law. I get along fine with all of them. Nothing particularly special, but nothing particularly bad either. Sometimes I can feel weighed down by different expectations they have, and sometimes I get frustrated when trying to talk to them about anything other than concrete subjects... none of the ISFJs I know are at all strong in the abstract arena. My father in particular can be frustrating (even though I love him dearly), he is quite set in his ways.

My brother is the most open of the three, and I think a lot of this has to do with his ENFP friend (who he is VERY lucky to have. My bro is so shy he doesn't really have any other friends, but this ENFP has known him since they were little and has sort of made it his mission to bring my bro out a bit, and help him learn how to enjoy life. They seem to balance each other quite well.)
ESFJ - sister, mother and aunt. Hmm, this type has more of a tendency to rub me the wrong way... not excessively, but...
I just have a hard time with the constant talk about shopping/who's pregnant/who's getting married/etc etc etc... especially when it's my sister (she has very strong S and E and will talk non stop for as long as someone will pretend to listen). My mom has a very strong tendency to rub me the wrong way, but a lot of that is due to her being imbalanced...
For short amounts of time they can be fun though, or at least funny.
ESTJ - I know two people who I think are ESTJ (they haven't been tested). I don't know if they are very indicative of the type though, they both seem extreme Te to me. And they both drive me CRAZY. Really. It is rare that anyone actually affects me like this, but I can hardly stand being around them. I'd go into more but I don't want to rant.
ESFP - my other sister (14 yr old). Get along great with her, heaps of fun. She has an excellent sense of humor (loves to tease and be teased). I think our common Fi helps us to connect. Her P is also refreshing in the midst of my SJ dominated family.
I would really like to meet some other Ns, especially ENTPs, they sound like a lot of fun. Currently where I live I don't know any Ns other than my husband, and it's been a little difficult not having anyone else to talk to/do things with (not that I can't talk to the Ss that I know, but it's just not the same...).
Hopefully this isn't too off the topic of what you were asking for in the OP.