The Asus PadFone, the combination tablet and phone, will be coming to Asus' home country of Taiwan in May. Furthermore, details of pricing were also released. The phone by itself will cost 17,990 Taiwan dollars, (which is around 610 USD). To get both the phone and the tablet will cost you 24,980 Taiwan dollars (approximately 847 USD). They will also offer a keyboard dock for an extra 100 USD.
Of course, these prices reflect the local economy of Taiwan, and should not be taken as a final pricing for when they come to Europe or North America, although there have been no details released on when or if they will happen. We will keep you informed when we find out more.
Source: TransformerForums.com via UnWiredView