Is it able to scan postcards or any other funny formats?
It can scan anything that is flat... so yes, postcards, photo christmas cards, post-it notes, business cards, 200 page contracts... it does it all. To see it in operation.. it is remarkable.
Don't get confused into choosing a flatbed model. I have a few of these in the house that I've used over the years... but they largely go unused. One of the things that I remember reading about setting up a paperless office is that a full duplex sheet fed scanner is required... and that anyone trying to do this with a flatbed will eventually give up due to frustration.
The ScanSnap does NOT have a wired configuration. I have found it unnecessary as I keep mine attached to my iMac via USB, and if I want to scan to a different device (or for someone else in my family)... I simply "scan to folder", which is configured to put the PDF into a shared dropbox folder we all have access to. From there, the person scanning moves it to its final destination on their personal machine. Honestly... we only use this for well under 1% of all scanning.
I have scanned all types of old photographs into my pictures directory, and then imported them into Aperture.
Most of the time I scan directly to DevonThink Pro Office. DPTO has direct support for Fujitsu, and is unbelievable if you want a paperless office. It uses artificial intelligence and the more you use it, the better it gets. I personally do not let it auto-file... but instead, I use the "magic hat" to suggest where each document gets filed. Filing is almost as easy as repetitively pressing the "next" key. It is that good. Scary good.
/Jim