[GadgetKen]

Just added US$50 to my Yackie Mobile account for a trip to Grand Cayman in early January(satisfied with November tests I did in Grenada). For security purposes, used PayPal rather than directly providing my credit card information. Account was immediately credited and received confirmation emails from PayPal, Yackie, and World Wide Web Owner(obviously a private labeled 09 Iceland account balance email from the .is domain).
Rate for Grand Cayman to US mainland seems very reasonable--outgoing to fixed line US$.45/min, incoming via US call-forwarding number US$.29, direct dial incoming to Iceland number free.
If my CECT M800 watch phone comes from Hong Kong in time, I'll see if Yackie works in it(sounds like something out of a James Bond or Dick Tracy movie!). Otherwise will use the Yackie chip in my Motorola Razr.
Backup will be a Digicel-Bermuda prepaid sim or an Iridium satphone.