The one thing that makes the Smith Kenyan BC at least somewhat credible is that someone felt the need to come up with pre-emptive fake Kenyan BCs to discredit Smith’s before it was made public. IOW, someone wants very badly for you to think Smith’s is fake. Talk about insecure. At best, we have in Smith’s document something that looks more realistic than Obama’s alleged Hawaiian COLB (and not Polarik’s bizarre ‘lesson’ in this thread).
I don't think all those fakes were made to preempt Smith's. I posted a link a long time ago to both Something Awful and 4Chan (Anonymous) where they called the Birth Certificate issue the "IRL hacking opportunity of a lifetime" and started treated trolling and dumping fake stuff as a game just like Anonymous did with Scientology. The one with the red background and shilling seal ended up being tracked back to a Something Awful member. Both sites have threads on playing with the BC issue and Something Awful even has a dedicated messing with Free Republic thread. In other words, there were a lot of groups seeing it as a game to play. (I recently learned even Cracked Magazine's forum has a thread on messing with Birthers.)
That's why it is best our level of scepticism on things we 'hope' are real are just as high, if not higher, than we give to what the President releases.
As you may recall, Smith was ready to submit himself to cross examination in Judge Carter's Federal Court where the government's lawyers would have asked him to where, how, and when he received Obama's Kenyan birth certificate.