Not that I am aware of. If you can't get it at least back to service or recovery mode I don't think you'll be able to get your information. I would look into that program that was just released to fix bricked consoles. You need a nand dump, but it might work for you. http://www.ps3news.com/forums/ps3-ha...le-118367.html
Here's a little piece of advice: When working with the dev_flash or any other part of the OS that could result in a non-working OS, always use a spare HD. I swap my original HD back into my PS3 when I'm playing with stuff, so that if I screw it up I don't loose my data.