During high season, several travel agencies and ship lines (I can recommend Corful Holidays or the Petrakis Lines) offer 1-day excursions to Albania. The excursion is becoming popular even though it doesn't go to the capital; the fare for a day trip now costs about 80€, which should include visas, port fees, and a midday meal. Most interesting is to take a brief visit to the major archaeological site of Butrint, a UNESCO World Heritage Site. Travel agents in Corfu or at the Albanian port of Saranda, where you land, will set you up with a guide; prices vary depending on your wants, but in general, Albania is still cheap.