These would be amazing if they shipped with a WREL (Wireless Resonant Energy Link) device to charge them, however I believe a simple multi-mini-usb 2.0 dock would suffice, however wouldn't be as useful.<p>I believe this would be the key problem with this technology for classrooms and such. Small children aren't going to remember to plug these back in, and I'm unsure if teenagers would even remember to plug these back in, so I would love to see a wireless charger for these. I mean even if it's simply one of the touch-charging pads and not the longer distance WREL.<p>Also things like battery life would be nice to know. I mean do these things last as long as an iPod's play time, or do they last like 15 minutes?<p>One thing I'd love for these is if they were capable of parallel processing. It appears they just pass information off to each other, and then the one device does its own task. I'd like it if you could stick 3 together and run a program that 1 alone can't. I mean with WREL power these could compete with PCs, with the right software, because the more power you need you simply stick more blocks together.<p>I mean you want portability, then stick a couple together and you've got a PDA. Need a bigger display, well stick another four together or have an external display you can click multiple siftables into to get a full screen. Need more power? Stick an extra row under the four and still use the existing screen. Going on a road trip with some friends, but still need a laptop? Well if everyone has a couple of siftables each, then stick 16/32 together with an external display and boot up ubuntu or XP! I hope the technology goes this way, but I have my doubts.<p>Edit: The laptop example would be perfect, each persons siftable carries their own data. Yet when you click a bunch together you can all carry different accounts on a laptop and do your own thing, and when you're done you take your siftables back with your modified data.