Adobe has now released Photoshop Express. It's an online Photo editor, and though it doesn't boast nearly as many tools as traditional photoshop. It can still be very useful. Another cool fact is that you can get your own sub-site like (yourname.photoshop.com), so the faster you sign up the better your chances of getting your name.
3 main reasons I would check this out.
1. It's 2GB of free storage for photos that you can use for your blog, facebook, myspace, etc
2.Adobe has said that with in 10 years all of their apps will be online, so considered this an early sneak peek.
3.It's Adobe, they tend to do stuff right. So why not get in on this at the beginning and see where it goes.