@wco81, I'd mentioned that Sosh (and a similar SFR Red) prepaid option earlier in this thread; great options, but appear to be available only to French residents and designed for recurring monthly use. Would be so good to be able to use those, very inexpensive for plenty of 3G data!

I think the HolidayPhone data SIM's are good for use in MiFi's, and Lebara's free SIM worked great too (plus could activate and charge online here in the US and have the French number known before leaving).

All around though, I liked LeFrenchMobile's offering; not the cheapest, but still pretty reasonable voice and data packages. Good service, all in English, and was reliable.