Unfortunately, I've only stored pictures of the iPod Slide on my hard-drive with the watermark. If I wanted to move/change it, I'd need to re-render the picture. Even so, I'm sorry but I'm not willing to change the watermark on those particular models. Cool, I'm sure it looks good!
ask Bgizzle to be safe, as long as your not selling anything or linking to anything illegal it should.
Feel free to use anything I've posted up here. Let me know when you're site's ready and I'll have to check it out :D