Out of print SF books coming as eBooks

SF Gateway puts tons of out-of-print SF classics online as e-books

This looks like it has promise. No mention on cost of the books, but I hope it'll be reasonable. Might be able to pick up some classics I've never read.

I'm amazed it's been taking so long for so many out-of-print AND very-likely-to-never-again-be-in-print books to make it to the ebook market. I know it's a matter of securing rights, commonly from family members, and that it can be complicated sometimes; it just doesn't seem like it should take as long as it has for the bulk of such material.