Hmm, now that I'm home I took another look at this. SCSI seems very plausible, and looks to be the right shape, but from what I've read it comes in either 50-, 68-, or 80-pin variants. What I'm looking at is 120 pins (yes, I counted), 60 pairs on the top half and 60 pairs on the bottom half. Not sure if this means it's not SCSI or if it means I'm counting something wrong, so I'll see if I can show in more detail what this thing looks like.
I can't get a clearer picture than I already have, so I'll see if I can make it work:
Note: (EDITED IN) You may also be able to see from this that there is no separator between the pins, whereas pictures on the web seem to imply each pin for SCSI is in a separate rectangular partition.
Per request for more information:
It's a Dell Inspiron 3500, Model Number TS30T, service tag W242P (unfortunately looking through the parts list for that service tag doesn't seem to be helping and in fact, the parts list doesn't match up very well, leading me to believe this may well be aftermarket installed).
As an example, the parts list on the service tag implies it would have a zip drive which is notedly absent.
I'd love to tell you what software/hardware it was for but I'm not privy to that information at this time. If I get the information (and can't Google an answer for myself) I'll definitely let you know.
Thanks very much for all the help so far! I'd like to believe it's SCSI but like I said the above makes me think it's not so easy