I resently recived a wedding invite from a distant and some what estranged friend, but the response card came unstamped, should I assume this means they really dont want me there? Or that they just have bad manners? Any insight would be wonderful... Thanks

It could be as simple as they forgot to put a stamp on there. I double checked mine as I put them together in case that happened so it would have been easy to forget.
If you aren't going, I would mark that and spend the .41 on a stamp and return it with a nice note.

As skyler said, it was probably an oversight. The process of addressing, collating, stamping and stuffing invitations can be a very monotonous one and it is very easy to make a mistake. When my fiancee' and I did our save the dates we checked and double checked and still found out that we had missed one magnet in the enclosure. So, don't read much into it, go and have a blast, if you choose, but definitely respond either way.

I agree with these gals...it was probably an oversight. I know when I double checked mine, I had missed one or two. Regardless, you should respond.