wololo.net/talk

is there a homebrew app, plugin or something that tells how long the ps3 has been on

Did you search for one? Have you used google? I don't understand a lot of these topics... Is it due to laziness?
Even your title says pretty much 'I don't give a ***, just give me an answer'...

Very good points you wrote here..Great stuff...I think you've made some truly interesting points.Keep up the good work. Vodafone All USSD