By Windows, do you mean Windows XP or Vista? If you so might look into one of the UMPC or Origami project devices. Example devices are the OQO model 01 or model 02 or the Samsung Q1. Sony also has some Vaio branded UMPCs. Prices are about $1k-2k. All are wifi and some take EDGE/HSDPA or EVDO data connections (using various embedded radios or an add-on card).
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Domino 7.0.4FP1 | BES 4.1.6 MR-7 | 42 handhelds
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