Mushroom Networks has been in the “broadband bonding” business for quite a while now, but we’re guessing they’re going to find a few more fans with their new wireless broadband gear, which promises the fastest cellular-based internet connection to date. Like the company’s previous PortaBella device (pictured above, not exactly to scale), its new rig can combine up to four different cellular data cards into a single high-speed connection, but this one is fully portable (just over a pound) and, perhaps most importantly, it has an optional battery pack that’ll let you be truly mobile with it. That, Mushroom says, makes the device ideal for a whole range of applications that can be a bit tricky with a single modem, like mobile TV broadcasting or temporary offices set up in a disaster area. Unfortunately, there’s no word on pricing just yet, but it doesn’t exactly take much guesstimating to figure out that it’s likely not the most cost-effective solution around.