Here are a few that feature uniforms and dogtags, some as a thematic element and some as a kink:

starting_gate/Uniformly Speaking (http://starting-gate.livejournal.com/22167.html)
Gateroller/The Voice of Command (http://www.area52hkh.net/asg/gateroller/voice.php)
Annie D. and Katryne/Grown Men Don't Freak (http://www.area52hkh.net/asa/annied/grownmen.php)
paian/You Can Fall for Chains of Silver (http://paian.livejournal.com/55959.html)
destina/Elements (http://lyricalmagic.com/elements.html)
brainofck/An Accident Waiting to Happen (http://brainofck.livejournal.com/204586.html)

There's also some J/D artwork here (http://www.tenebris.org/x__art/sg_index.html) that makes yummy use of dogtags and uniforms.

:-)