The 5" version of the BeBook, the BeBook mini, will be available for sale within 'the next 4 weeks', according to a tweet from Endless Ideas, the company behind the BeBook.
The BeBook mini will be able to display ePub ebooks. It is not sure yet whether drm'ed Mobipocket is also supported. The ereader does not offer wireless connectivity; this option will be featured by BeBook 2, which is expected fall 2009.
Source:
eReaders.nl