A video has surfaced on a Dutch website, in which the BeBook mini and BeBook 2 (with wifi and 3g) are discussed:
The interview is with the BeBook ceo, unfortunately it's in Dutch. The BeBook mini offers exactly the same specs as the first BeBook, but only with a 5" screen. Price: EUR 199,-. The device should become available after the summer.
BeBook 2 will offer wifi and 3g connectivity. The BeBook guys are negotiating with wireless carriers about mobile plans, but no details were given. Expected price tag of BeBook 2 will be somewhere between 350-400 euros.
Update: the BeBook 2 will also feature text2speech (via BeBook twitterfeed)