Just think of this exploit as a demo. A demo that shows that you can run homebrew on your PSP Go through a special method. Using this special method, the person who made this exploit was able to make a PSP Go display a message saying 'Hello World' or something unimportant. But you won't be able to luanch homebrew apps and stuff until this person or some other person makes a homebrew launcher
Hope this helps
As long as people don't update before a proper exploit is released, shouldn't they be fine? I don't see how an early release completely kills the exploit (assuming end-users get the news and aren't dumb).
Then again, I don't know anything about the PSP scene. Wii FTW. But drama exists on all the scenes