Yup, I put in my computer IP Address from ipconfig and I can see the mobile interface on the n810.

Only one problem: media indexing isn't working.

From my post above:
I'm adding directories containing video files, and it shows the directories under "Settings">"Scanned directories", but my video files aren't showing up under "Browse" (even when I click "Videos" or click "by path", which shows the folders are added, but when I click on the folders, they are empty). Under "Settings" the "Items in collection" is remaining 0. The videos I'm adding have the extension .avi, which seems to be included in the "Scanned video extensions". Do I have to wait while it indexes or something?

Note that I'm adding files on another partition of my drive, with a different drive letter (in case that affects anything).