Since you seem to be closing out this thread I feel compelled to post even though I still need to do a bit more Chowhound fieldwork. In the past my favorite cevapcici has been found at Bosanski Okusi, which was located on North Lincoln. Bosanski Okusi moved to 6014 N Broadway and, though I have every expectation of the cevapcici remaining the same, I have not had a chance to try the new location, and one never knows.
I posted my impression of these, and other, cevapcici to chi.eats in March of last year, though the focus of the post is Simplon Orient Express on Lincoln. (Link provided) Since that post I have eaten a few times at Balkan Restaurant and, while I enjoy the food at Balkan, could not classify it as 'make a special trip, drive from the other end of the city to try.' The most interesting thing about Balkan Restaurant is the wood burning stucco-covered rotisserie in the window of their Lawrence Ave storefront.
Balkan's lamb, which they roast in the wood burning oven, has a wood, fat in the fire flavor, and the skin is crisp and flavorful, but the taste is a bit one dimensional, they really need to pay a visit to The Spice House on Wells. Rene also mentions the curious lack of spicing in his post. The cevapcici are good, though they seem to be the puff then deflate, baking soda type which I mention in my chi.eats post. I also intend on trying some of the other menu items that Rene mentions in his original Balkan post, to date I have only had the lamb and cevapcici.
Balkan seems to draw a similar clientele as Bosanski Okusi and occasionally seems more like a place for Serbs to get together, drink coffee and smoke cigarettes, than a restaurant.
I should mention that, like many of my forays into interesting and somewhat eclectic cuisine subcategories, my interest in cevapcici was prompted by a World Eats column authored by Monica Eng. I, in full agreement with Zim, feel that the Chicago Tribune is woefully remiss in not providing a fully searchable database of Ms. Eng's World Eats and Dumpling Zone columns.
2321 W Lawrence Ave
'Taste of Bosnia'
6014 N Broadway