Just found this......
I ordered a Veho VFS-001 scanner about a day before reading this
thread, and then spent the next three days awaiting my £60 cereal-box
toy with a kind of dread, but now I'm glad I didn't get scared off!
The scanner is definitely using a 5MP sensor, given that it's capable
of resolving dust specks only a pixel wide. Interestingly, it is
listed in the manual as a 5.174 million pixel sensor, which is
presumably what was badly transcribed in the advert the previous
poster refers to. Yes, the quality of the english in its advert and
manual are pretty comical (there's a phone number on the back page for
"Supper in the UK"), but the hardware itself is very nice - solidly
built, simple to use, and assuming you don't need more than 1800 dpi
(its native resolution) a very effective solution. Comparing the scans
vs. a Canon flatbed, it's definitely pulling out more detail with a
better dynamic range.
For what I need this may be just the thing.