Modern Bikes is working on a new prototype frame. Interestingly they will also make a prototype with enclosed dropouts as you can see in the drawing above. Doesn't make any sense? Yes, it does, if you have a hub with a female axle then this design works without problems while making the dropout stronger. Check out the Modern Bikes forum discussion as well.
Here are some more details: - OX Platinum Tubing 3/8" Enclosed Dropouts - 19.0" TT - 75° HT, 71° ST - Mid BB - 5.5" SO - 11.5" BB - 13.0" CS (Slammed) - Removable Mounts & Guides, Drilled For Gyro Tabs