dick said:

Is there a sub-group to help Mac users to create e-texts that will communicate successfully with PCs?

not really. but i write mac software for that purpose, so if you're ready to start making e-texts, let me know. the e-texts you make will work on any platform.

Are there individual volunteers who use Macs and can advise others?

i do, and i can. just backchannel me. -bowerbird