[Worldwalker]

It would be a huge help to prospective buyers (at least those who don't want to buy DRM-restricted books, like me) if authors posting notices about their books being available cheap or free would add "[DRM]" or "[no DRM]" to the subject line.

As it is, most of the time I don't even bother to investigate the books, because I figure most if not all of them are DRM-restricted, and it's not worth my time figuring out which are and which aren't. Plus there's the disappointment of spotting a book that looks good, only to find that it's one which I won't buy for that reason. So if I know in advance, I'm more likely to click on that listing. I'm sure I'm not the only one.