As a content provider to Project Gutenberg (and in no way speaking for PG), I am happy enough to see these books become available through the iBookstore. Even if Apple decided to charge something, it would be no different from the dozens of other sites/business that have repackaged and sold PG books for years. Volunteers get used to the idea, and if they don't agree with the concept that Public Domain means Free to Use, they stop helping.
That said, I'd like to clear up a couple of misconceptions. First of all, not everything in the PG catalog is a "classic" or in the Public Domain. Sure you can find that stuff you were supposed to read in Lit class, but you can also find other stuff, like books in Chinese, Tagalog or Finnish (to name 3 of the
more than 50 languages, including FORTRAN); books about
Natural History,
Folklore and
Cooking; and of course,
science fiction old and new (including works by Cory Doctorow, whose
Down and Out in the Magic Kingdom appears in the picture accompanying the article). Yes, many (most?) of the books are dated -- that's what you get when copyright lasts so long -- but it's not all
Frankenstein and
The Time Machine (in fact, you might be surprised to read some of the other HG Wells books...).
I don't know if Apple approached PG or what, but I do know that PG has been converting its texts to epub format for a while now. It's done automatically, so there are likely some formatting issues, but I'm looking forward to seeing how some of the books I contributed end up looking (I haven't been happy with the Kindle versions).
And if you'd take some advice from a newbie Macrumors poster, consider looking for books with numbers >10000. These books have been mostly produced by
Distributed Proofreaders, who have been improving the quality of the ebooks for nearly 10 years now.
In fact, if you can't or won't donate money, consider donating your time or expertise to DP. The site is awful for UI/UX, and could use some programming help, but the minimum that's asked is for one page a day of correcting OCR text. That's how you get >30,000 books in the Apple iBookstore for free.