After dealing with people who refuse to read what I write, I came up with a simple solution. Using a tablet computer I write what I want to say and let "festival" (an open source free text-to-speech application) say it. The tablet reads my writing well enough, OpenOffice does spellchecking to get it closer, and festival gets it out for those people that won't read my screen or whiteboard. Cheaper than buying a separate device to do the translating (and all the other devices I've seen require typing - using a tablet I can write faster than I could type).
I'm new here, but read back a few pages and saw comments relating to this issue without this option mentioned.