http://www.hw-server.com/test/sld_hws.html
Take a look at the DIMM modules.
Looks like a good candidate for a battery-powered portable VoIP/GSM
encrypted cellphone. Add a GPRS modem or a cellphone (or, for landline
version, a modem), a small display/keyboard, and eg. SpeakFreely with
suitable
I was considering this avenue as well. Would be something between good and
perfect, but the cost is prohibitive :(
Also, there are security concerns with multi-purpose devices, as they are
more complicated and more prone to exploitation; secure devices should
have as few functions as possible
