If you're a Internet veteran, you'll recognize Project Gutenberg as one of the greatest resources online. The Gutenberg catalog contains thousands of public domain e-texts such as H.G Wells's The War of the Worlds. The only "problem" with the site is its lack of additional formats. All works on Gutenberg are available in plain text and HTML. This is fine for your computer, but for PDAs that's a different matter.
This is where Blackmask comes in. They have converted e-texts into popular formats such as PDF, Microsoft Reader, and iSilo. You pick the format on Blackmask. It's as simple as that.
Over the years Blackmask has been one of my "can't live without" sites. I have a PDA which I load up with books. It's extremely convinient when I'm on the go or waiting at the barber. Check it out.