I found a very smart list (as long as a list could be judged smart) of micro-nations. Few examples here:

NSK ELECTRONIC EMBASSY . http://www.ljudmila.org/embassy/ PRINCIPALITY OF SEALAND . http://www.sealandgov.com/ REINO UNIDO DE SAYED . http://rsayed.cjb.net/ REMONY OF LADONIA . http://www.ladonia.net/