I see, many of the issues have been addressed with the new model. I am extremely happy about the RS232 and the 2nd NIC.
I use Hylafax, a fax-server, that allows to send/schedule faxes from any machine in my network and it uses a stand alone office modem, that I need to hook to the serial port.
Also, for media boxes, an RS232 is a nice thing to have, since several AV receivers (Rotel, NAD, etc.) use these for control and firmware update.
When I today found out about the fitpc2i I was already going to contact the local reseller in order to replace my current server (So370 VIA C3 on VIA C3M266) but stopped, when thinking about the harddisk problem.
Even a 500GB 2.5" disk is not enough, but even more so, not reliable enough for a home-server. I then checked the net for affordable NAS systems and realized, that it is cheaper to build one myself based on the Intel Essential Series D945GSEJT. And once I was there, I realized, that, with a little more RAM, a PCI NIC I get a similare product as the fitPC2i, though not as neat, priced similarily.
So, this is where I am now. The only real solution to the problem would be large capacity 2.5" HDD built for server mode (does not exist, IMO, and if, too expensive) and an additional (or two) in the fitPC2.
I did a little rendering to show sizes, in the first image the box is approx the size needed to hold three 3.5" disks (RAID5), with the electronics and PSU circuit being in the fit-PC2: