As reported by
telread, BoB's has a press release:
BooksOnBoard First to Offer New eBook Titles for the iPhone in Partnership with Stanza.
These are DRM-free ePubs from Samhain Publishing, see
eBooks for the iPhone from BooksOnBoard. Based on the "details" pages of a couple of titles (no lock icons), it seems that all versions of these ebooks may now be DRM-free.