Thanks for the ideas. Is there such thing as an external file host where users can VPN (or something similar) into to avoid using a dedicated office server? They can share files, emails, etc (kind of like a hosted exchange server)
Also I plan on using multi-function with ethernet, will this allow me to plug it into the AEBS (not the USB) and have it shared wirelessly with all the computers?
Yes, you can go the external file route (again, dotMAC does all you want, but there are most certainly more cost-effective solutions). You'd need to evaluate your requirements in detail--how
much data do you need to store? Bear in mind though, that for everyday use inside your office, this approach would probably not be very satisfactory because you'd be limited to internet speeds when accessing or saving your files. That's why I thought using an internal server and then mirroring your files to an external host would kill two birds with one stone: you'd have a secure, offsite backup
and you'd have the capability to do remote file access without the need to open your internal server to the outside world.
If you're open to a higher-end approach (I don't know what your budget is), an entry-level server from the likes of Dell with Microsoft Small Business Server 2003 could be had for $1000-1500. MSBS comes with Exchange Server and SQL Server, and it is designed for small businesses with limited or no IT staff...configuration is handled via wizards, and it allows you to set up a web server, remote file and application access, web-based email access, etc. with a fair amount of ease. This approach would make somewhat less sense in a Mac-centric network, but may be worth looking at if you want a lot of "back-end" horsepower.
Regarding the MF printer, yes it will be sharable from the AEBS. I assume that since you say you plan to use ethernet, the printer comes with a built-in print server and an ethernet port. That is good news, because it means the printer is designed for network usage.
Again, good luck!