I don't suppose there's much "crossover geekery" out there. By that newly-coined term, I mean people who geek out over two disparate things, and then think of ways to combine them.

But here's my Geographic Information Systems/knitting crossover geek moment (please understand I was also running a slight fever at the time):

In GIS, there are two ways of showing data: raster and vector. Raster is where you have a series of "cells," and you have something like graph paper where each cell has a particular value. Most satellite data is in raster format. (For those who do needlework or counted cross stitch: it's like a charted design). Vector is when you have lines to delineate the geographical elements, like on a conventional map.

Well, I was thinking: knitting charts are like raster data. And then I thought: But cables and twisted stitch patterns are more like vector data. But on charts, they're "rasterized" (it's possible in GIS to convert vector to raster data).

And actually, when you think about it, if you consider each stitch to be a cell, everything in knitting is done in raster. Embroidery, hand quilting - vector. Needlepoint, counted cross stitch - raster.

The thing that makes me sad is I don't think there's anyone in my GIS class who does any of those crafts, so they wouldn't appreciate the analogy like I do. They won't get that look in their eyes that lets you know there's a fellow-traveler in there.
(Kind of like the situation at quilt shops versus your typical fabric/craft store. You tell the person who is on cutting-table-rotation at the Hobby Lobby that you don't have plans for those half-yards of quilting fabric, you just like them and want to have them, and they look at you like "then why are you making me cut these for you?" (I mean, if they're going to respond like that, why do they ask you what you're going to do with it?) You mention that to the person in the quilt shop and he or she does that secret I-can-see-you're-a-sister smile.