Compact flash is cheaper, Sony would probably use something smaller and more expensive you need to rebuy. Otherwise, yes.
I've kinda cooled off on hating on the PSPgo. Just from videos and stuff at E3, it doesn't look as ugly outside of those rings. From what people who tried it out say, the controls are supposedly better than the current PSPs. Even the screen is supposed to be great; one site was looking to see if it has that interlacing thing of the 3000 and it's surprisingly the first time Sony has put a flawless screen on the PSP. Other than shrinking it half an inch and all. I don't how much I should trust these impressions, and it's still way too expensive, and I'm still pissed that they didn't add a second analog and even mock it by having start/select there, and a few other problems. But I would consider buying it if the price was dropped and there was a solution to get my existing PSP games on it.