Dubbed the Blufin, this PMP (or PDA, depending on how you look at it) from Korea's Tinnos, is a Windows CE-based handheld with a 30GB hard drive, 128MB RAM, 2 megapixel camera, a 4.3-inch LCD display, USB and SD slots (with both USB on-the-go and SDIO compatibility for copying files or adding functions like GPS [...]

Instructables has a step-by-step for turning a regular old landline phone into a VoIP phone.
This hack requires a little bit of electronic hobbist kinda soldering and might not be for the novice hardware tweaker, but the results look quite good. If you've been wanting to try out Skype but haven't wanted to [...]

Wall Street Journal has confirmed that the included VoIP app will indeed be, as we anticipated, Google Talk. Unfortunately this means that the device will still be unable to call regular phone numbers out of the box, although G Talk members will at least be able to chat among themselves for free. [...]