Marcelo,
Currently, there are no short terms plans to implement an OCR feature in PlanetPress. (and I have no idea if they will implement in the long term)
The only kind of OCR technology we have is the Barcode Scan action, which you appear to be familiar with already. We also have the ICR feature with the Anoto pen, which is similar, and allows you to convert written text into text data usable by PlanetPress(and thus exportable to other softwares as well).
Other than that, however, PlanetPress dosn't have "true" OCR capabilities at this time.
Regards,
Raphaël Lalonde Lefebvre