PLEASE ask about a full fledged Photoshop for Linux... I would be happy as heck if that ever came to be, haha. I own it for Windows... but don't use it as often as I should because I hate switching PCs.
I am not looking forward to the online version, really. Ads in your application puts a damper on things. I am not a fan of the GIMP, so it may be the next best thing.