I got one of these a few months ago:

Fujitsu ScanSnap fi-4110EOX2
http://www.fel.fujitsu.com/home/v3__product.asp?pid=353&inf=dsc
(now discontinued and replaced with the 5110 - http://www.fel.fujitsu.com/home/v3__product.asp?pid=380&inf=dsc&wg=75 - this one does 600dpi max (up from 300) and has USB2.0 instead of 1.1)

It's a scanner with 50 page sheet feeder plus it'll scan both sides concurrently. Comes bundled with a FULL version of Acrobat (not bad as this is almost £200 alone), plus an OCR plugin which is pretty amazing IMO. Under £300. Does about 15 sheets per minute, single or double sided, will automatically detect colour/b&w docs and generate the right output file, saving space, plus it detects paper size too.

I just scan all the bits of paper I get into OCR'ed pdf's (with the text *under* the scanned image, so even if the OCR fails I can still read the doc) then I can find anything using acrobat's PDF search feature (which will search folders of PDFs too). Plus, I can back up all my important docs which is very useful considering the number of things I can never find again.

It does do colour, but this is not a photo scanner. The quality is fine for docs, but really not for photos. Note also that it's NOT a twain device, you have to use the software they supply (fine by me, it does exactly what I want it to)

Definitely recommended!

Hugo