That is an interesting idea.  I think there may be a chance someone would develop an address book or pim for the Chumby that may let you import a .csv file or a .vcf or vCard file that could be exported via the Palm Desktop.  I've been using a Palm device since the first model was out and have held on feeling like an outcast   I don't know how much longer there will be a new device with the Palm OS on it.