Qube has just popped up the Steins;Gate launch trailer, with the game out in stores and on PSN tomorrow in the UK. However, at £39.99 on PSN, I'd go to a store and get a boxed limited edition for less, if you can. America is still waiting on Sony QA approval, with many looking to import, which should do UK sales a nice boost.
Check out my review, which I hope is pretty spoiler free. Truly, its a great bonkers sci-fi story and well worth investing in.