Thought I’d start to show some of the arm that some unrecognized countires have adopted.
Several of these are located in the caucasus region. Kind of how I stumbled upon them.
http://img436.imageshack.us/img436/1600/abkhasia0ma.gif
The Arms of Abkhasia, de jure a part of Georgia but de facto independent. Russia is in the process of finding a sly way to annex this territory.
The arms are nice, I think. Simple and with a nice regional touch.
http://img440.imageshack.us/img440/6940/nagornokarabakhcoatofarms2de.png
Nagorno-Karabakh, de facto independence but unrecognized. Actually, their arms seem eerily similar to the US seal, don’t you think?
http://img452.imageshack.us/img452/1616/southocoatofarms0ew.jpg
South Ossetia, another breakaway part of Georgia. Propped up by Russia, again. No wonder Georgia wants to join NATO.
Not sure if you’d term this a ‘seal’ or ‘arms’ properly, but who am I to question?
http://img352.imageshack.us/img352/6349/somalilandcoa1tj.gif
Somaliland, a breakaway part of Somalia (one of several). If you lived there, would you want to be part of Somalia?
http://img465.imageshack.us/img465/3581/huttriver1lb.jpg
Hutt River Province, a tongue-in-cheek country. Second largest counry on the Australian continent. 
I especially like the arms of Abkhasia, but mostly for the artistic interpretation.