My employer, unwired planet (www.uplanet.com), uses mostly cdpd here in the US. I don't know what kind of pricing is available, but the two phones getting the most use for us are the samsung and the mitsubishi, and both allow the cellphone to be used AS a CDPD modem (as opposed to connecting a PCMCIA modem to a regular cellphone). The prices I've heard are mostly in the range of $40/month unlimited usage (these are for the HDML-based data service, I'm not sure how it works when using the phone as a modem) (disclaimer: although I work for unwired planet, my interest in this list is personal and unrelated, and I do not represent them in any way)
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