Mystery computer appearing in the Finder's source list
The message "The server "otseeley-remote" is available on your computer. Access the volumes and files locally" means that what you're seeing in the sidebar is your own computer, not a different machine... why you're seeing it is the real question, and unfortunately I don't have any great answers for you.

More troubleshooting is in order, and if this were shorter I would have posted it as a comment....

There's a very similar question on SuperUser which unfortunetly has no answers... if I were you, I would comment on that question and link to this one. That will bump that question and possibly get an answer to it.

Someone has the exact same issue on MacWorld's forums however they never returned to give any more detail or let us know if the problem was solved...

Do you have an Airport Extreme with a drive attached to it? This person and this person also mentioned seeing the same message with an Airport Extreme device which had an attached USB hard drive.

A lot of people refer to this problem when talking about virtualization software. That was my first thought, but you said you're not using it.

If you turn off your airport card, does the share go away?

If you open the Terminal and type/paste in: ping -c 5 otseeley-remote.local, what do you see?

EDIT: Let's see if this reveals anything. If you use a program like Bonjour Browser, do you see otseely-remote under any of the services? (You can expand all the levels of the tree by option-clicking on the topmost disclosure arrow twice)