Ok, well after trying out those other two (web-aim and the e-messenger ) i thought to my self, theres got to be something better than this, so i went searching and i found something called AI-BUDDY(www.ai-buddy.com )
This one is perfect, you get to stay online 24/7 even when your psp is off.
Theres a buddy list, auto messaging, even bot mode, you never have to type in your password to go back in, just save it as a bookmark and whenever you open it, it sends you to your main menu where you can check your messages.
I was really impressed with this one and i recomend it to all of you with psp 2.0 ,the tab switching really comes in handy with something like this.I havent tried it with the wipeout browser, it might work on it, it dosent hurt you to give it a try.
The only little downside: you have to create an account at the AI-BUDDY web site, log in with it and after that you can log in with your AIM account.
here are some screen shots for those who are interested: