The Canon Pixma iP90v is the Vista-enabled version of the older Pixma iP90 and offers nearly the same print speeds and quality. It's a very useful printer if you travel a lot and need to print often, but consider the purchase carefully because it's quite expensive.
review.zdnet.com
the print quality was very good, especially for a four-color printer.
P entax Technologies is pleased to announce that their UK distributor RGI Mobile Solutions will showcase the ultra mobile Pentax PocketJet 3/3 Plus printer solution and Pentax DS Mobile 600 colour scanner at Service Management Europe at the NEC, Birmingham, in October. RGI Mobile Solutions have been distributing the Pentax PocketJet range of portable printers and peripherals for over seven years. Thousands of PocketJets have been successfully installed in utility, fire, ambulance, military...
letsgomobile.org
Text looked more jagged than that of a crisp laser printer but was within the inkjet quality range
The bottom line: The PocketJet 3 is pricey and prints only on special paper, but it's more convenient than a portable inkjet if you need to print black text in out-of-the-way places.