There are a number of portable scanner solutions available for both
PCs and Macs, but I think this may be the first portable scanning
solution for the iPad, the iConvert Scanner.
The iConvert Scanner is basically a dock for your iPad and it is
compatible with both the original iPad and the iPad 2, and it comes with
an iPad application.

The iConvert Scanner can scan documents direct to your iPad, and you
can then choose to save the document on your iPad or to email it, have a
look at the video of it in action below.
The iConvert Scanner for the iPad and iPad 2 will be available for
$149.99 in February, you can find out more details about it over at Brookstone.
Source Dvice