So we have the plumber here taking apart our sink and stuff, due to some problems with food and suds backing up into our sink, although we are very careful to not put anything in our drain. In looking for the blockage in the main pipe (which in turn causes ours to back up), the plumber noticed that the pipe leading to our sink was completely rusted, and needed to be replaced. I've posted a picture of our yuck-filled pipe. I'm sure he'll be here fixing it until well after 8pm.
My sister got a Mac mini today. It's much much faster than mine.