At his initial appearance, Karadzic noted that while he doesn't have a defense counsel, he does plan on defending himself with the help of an "invisible advisor."
As this Time Magazine article explains, representing oneself at the Hague has several tangible upsides for defendants.
Karadzic's new advisor(?)

And in related news...
Besides Karadzic's appearance, the other major news was the resurfacing of rumors that the U.S. government offered Karadzic immunity in exchange for staying out of public life, which the U.S. State Department denies (not exactly a shock there).
While as of yet, there is no "smoking gun." Evidence pointing to a deal has gained more and more support.
But, even without a specific deal, the extreme reluctance (to put in politely) of NATO forces to arrest alleged war criminals is well known by now.
For a good discussion on a possible deal, check out East Ethnia and Justwatch-l discussion group.
And on the subject of Karadzic's new home, an excellent two part article from Slate Magazine.