When it comes to eReaders, it looks like customers prefer to have a WiFi-only model. Despite Barnes & Noble's Nook product line showing all-time sales highs (thanks in no small part to the uber-popular Nook Color), the e-ink Nook 3G is apparently about to be discontinued, according to an Engadget tipster.  Sales will continue until supply is depleted, but after that, don't expect to see any more of these.

As eReaders only need data connections for downloading books (usually not something you'll do everyday) and syncing, it makes perfect sense that more customers opt for a cheaper WiFi model.

It's been a slice, Nook 3G.  [Engadget]