HP is also continuing its push for expanded cloud-printing solutions, so all four models are compatible with Google Cloud Print and Apple AirPrint, as well as HP's own ePrint, which lets users send jobs from any connected device over the air using a uniquely assigned e-mail address.
I've tested this feature across multiple Officejet devices and each time I'm impressed with how easy it is to just copy and paste the text you want printed into a message.
The 6100 and 4620 both offer tactile buttons on the control panel, but bump up to the 6600 or the 6700 Premium and you'll get 2.65-inch touch screens that enable navigation through the onscreen menus. You also get a collection of preloaded apps that let you print everything from news pages via the Financial Times and USA Today to coloring pages and paper airplanes for the kids.
The HP ePrintCenter site acts as a hub so you can download more apps and rate them after.
Head over to the HP landing page for more details on the HP Officejet 6700 Premium, the Officejet 6600, Officejet 4620, and the Officejet 6100, and check back with CNET for reviews coming soon.