This is how I'm going to keep track of when people joined my friends list... by acknowledging them in my journal. I have done it some of the time before, but not in the early stages... I always thought it was an etiquette thing... but I can see another value in doing it now. I've also copied my entire friends list into a private post and saved it in my memories... I'll do this at regular intervals so I can see the changes. I might even go back and try to work out some more stuff from my journal... I'll save that for next time I'm bored.
If you are one of the friends I have not welcomed or acknowledged, then please accept my apologies and feel welcomed now.