I haven't had to replace one of these, and they're truly ergonomic. I switched to an ergonomic keyboard after writing my dissertation gave me pain in my wrists using a standard keyboard. Getting used to an ergonomic keyboard makes a world of difference for wrist pain, and it's completely natural to switch back to a conventional keyboard. I'd also be careful in buying Microsoft ergonomic keyboards. These tend to separate the left- and right-hand keys, but do not slant the keys to match the natural angle of your hands when typing. The above Adesso keyboard (and keyboards from other manufacturers) have angled keys that more closely match the natural orientation of your hands when typing.
Another great input interface is the trackball. I use the Logitech M570 Wireless Trackball. I've found that keeping your mouse arm stationary goes a long way for wrist and arm pain too. These take a bit of getting used to, but they're well worth the commitment. The only drawback is that I have to clean my trackball once every couple of days.
Link to Original Source
Thereby disadvantaging the non-technical user once again.
Am I the only one who thinks it's a bad idea to allow JSTOR and others to prevent worldwide dissemination of academic knowledge through a paywall?
No. Apparently, Swartz does too.
note: I'm not affiliated with Spotify. I'm just very happy with the switch, and I think more people would do online streaming--whether video or audio--if they had access to vast collections of media and the ability to watch or listen offline.
The reason I keep using PGP, however, is because of digital signing: there's a good guarantee that signed messages were actually sent by me. Headers are fairly trivial to spoof. With PGP, a 'hacker' can only impersonate me if they have access to the private key, which requires physical or ssh access, and he or she must be able to decrypt that key.
That said, I wish more people would encrypt their messages. This should be a no-brainer in a lot of fields, including human rights and for health and human services, and I think the barrier to commit to email encryption is still too great.