Well, not completely finished. Unless you deem finished as complete up to the Elite Four and Champion. I'm working on owning Team Galactic and getting Heatran now. Then I'm gonna work on my competitive battling team. Hopefully I can get some help on that as well. =] Other than that I'm basically done with Platinum.
...Well, I'd kinda like to get all 5 trainer stars, but unless I get a DSi and keep my DS Lite, that probably won't happen anytime soon. And that's because I need to get 50 flags on the Underground via wireless play with friends. ...And I don't wanna go to my cousin's house. He'd probably throw a little fit if I owned him in anything. :< So yeah. I'd be better off getting a DSi.