AA5CK on his iDuino MEPT beacon
Check out his nice pictures and description of his beacon and keyer:
Addendum: His oscillator/buffer board is a very cheap kit produced by www.vakits.com. It seems like quite a bargain, and could easily be the start of a MEPT project.
I recall burning three or four weeks of a sabbatical getting Saccade.com on the air with Wordpress. So much tweaking…