Yeah, good point Tink. Sun's father doesn't have a reason to come after them if they're presumed dead. Of course, they'd need a low-profile rescue per se or else word of their survival would get out.
As for Charlie packing heat, fuzzy, I'm inclined to think that they wouldn't automatically assume that Charlie's in cahoots with Sawyer. Sawyer's not just hoarding the guns for fun but for a profit. Presumably, he's willing to give them to anyone who has something worth trading. So Sayid and Anna could guess that Charlie got the gun by any number of means that don't necessarily point to betrayal, right? At least that's how I thought about it. Anyhow, I'm very, very glad that Sayid has the gun now.
I don't know about the artificial insemination theory, but I definitely think that her expression and that oh-so-long camera shot point strongly to a half-truth on her part. We'll just have to wait and see.
I can't wait until they "deal" with that creepy guy. He's an Other, I know it, Parker Cottontail knows it, and it's just a matter of time before everyone figures it out. I hope.