If you're interested about the Hungarian minority in Romania, you'll find lots of information about how they got there in the first place and what happened afterwards in the article I wrote together with Leo Paul on The pros and cons of autonomy rights for the Hungarian minority in Transylvania. You'll see that some subjects are politically quite delicate in Romania. Bilingual signs for example are very common in some parts of the country, but cause a great deal of stress in other regions. Also, education is a hot point of debate wherever minorities are concerned. In recent years, the guarantee of Hungarian-language schools and universities was an important theme in the campaign of the UDMR, the Hungarian minority's party. Fortunately, the supposed problems only really seem to exist in the political sphere, and not between individuals.
Oliver Kiss, an ethnic Hungarian journalist-in-training from Cluj/Koloszvar, Transylvania, recently wrote A democratic dream: the re-establishment of the Hungarian Bolyai University in Transylvania , about the failing attemps to re-establish the Hungarian-language Bolyai university in Cluj. Also, he wrote The Hungarian minority in power in Romania: the failure of a 'European model'? , about the failure of the Romanian-Hungarian government to reach preset goals. Note that he writes from his own specific background as ethnic Hungarian and that the opinions expressed are his own. Other people could (and will) look at the facts in a completely different light.
A wierd little section of the Hungarian minority in Romania are the Csango-Hungarians. They seem to be a seperate branch of Huns that crossed the Carpathians into Moldavia and settled there.