There's still a lot more to resolve--for example, Serbia (and Russia) mildly disagrees with the whole independence thing--but in the spirit of celebration, the Kosovan government started things off by adopting the world's ugliest flag (see below, image from Wikipedia). They managed not only to copy the Bosnian flag, but to make it much, much worse. The Albanians will no doubt continue using the Albanian flag (perhaps the real intention behind adopting a horrible flag, anyway).
Many countries, including some EU countries, won't recognize Kosovo's independence, starting of course with Serbia and opportunistic big-power ally Russia--this means that Kosovo can't join the UN for the foreseeable future due to Russia's Council veto. But EU members who won't recognize independence, generally for self-interested reasons, including Greece and Cyprus (due to the Northern Cyprus separatist issue), Bulgaria (Russian relations, perhaps?), Romania (Russian relations, too, but also maybe solidarity with Moldova over Transnistria?), and Spain (which has its own problems with ethnic separatism).
On the other hand, France (no more Corsica problem), Germany, Britain and Belgium (following its national motto of "ever