Scan from flatbed scanner directly to your Android device. InSaneScanner is a frontend for SANE - Scanner Access Now Easy (see: http://www.sane-project.org). Note: your scanner need not be wireless, but needs to be configured with SANE backend. Once scanned, the image can be e-mailed or seen in Android graphics viewer and saved. Support for most USB flatbed and all-in-one printer/scanners by HP, Canon, Epson, Brother etc. You can even scan over the Internet if your server is configured this way.
For a list of supported scanners see this page: http://www.sane-project.org/sane-mfgs.html.