I don't regret buying mine at all. There are great games out for it right now, but since you have a 360 you may have already played them. Still, MotorStorm (JPN), Resistance, Gran Turismo: HD Concept are all great. There are a lot of great games coming out within the next 2 months as well.
As far as blu-ray movies go, I must admit i'm a little disappointed in the library so far but it needs time. It's probably just me though, as i'm also not fond of the HD-DVD library.
Is the PS3 worth it? Definitely. Is it worth it for you to get right now? Well, that's up to you, but you aren't paying for it so what do you have to lose? If you don't love the PS3 now, you will love it later.