I occasionally use a scanner - normally as a photocopier, but recently I'm having to scan and keep some A4 documents - these are usually just black and white photocopier typed sheets.
What format should I save these in? For the b/w stuff I've been saving at 150 dpi and as either a JPEG or PNG, as I'm a Fireworks boy

I've been looking to convert these scanned pages into a single PDF document as well - any advice on that front is appreciated as well.
Any recommendations or tips?