Little Brother & mp3 tagging

So I just bought [boingboing editor] Cory Doctorow's new book Little Brother as a DRM-free digital MP3 download. Have a look at how they ID3-tagged the file:

No ID3v1 tags, almost empty ID3v2 tags. Digital downloads save publishers money in that they don't have to print CDs & packing material, assemble it, ship it, and suffer reduced profit from the retailers markup. I'd hope they would at least make the digital package complete before selling it. (I'd also prefer the MP3 be divided by chapter).