I scan everything with an old Visoneer into PaperPort. Works great.
As someone mentioned; keep it all backed up --- a USB Hard Drive works great for this.
As I just posted about, I basically work out of a mobile office (see this post) and it's great to have bills and reference material handy when needed.
The old Visoneer is really slow. So, I look forward to hearing about the Fujitsu! I've been eyeing that.