Bratislava

Wiki Lowdown - See what wikipedia has to say about Bratislava. Dry but good source of info.
British Council - Check out what Bratislava's branch of those great bastions of British culture are up to.

Slovakia

Slovakia.org - An excellent source of info on the country as a whole.
Slovakian Tatras - Sensational mountain range that warrants exploring (see also the Polish Tatras)
CIA World Factbook - Slovakia in a nutshell of facts and figures.

culture

Slovak Philharmonic - A dose of classical culture.
National Museum - All the many branches of the Slovak National Museum.

travel

Prague Map - A fantastic map of Prague with the exact location of hotels, restaurants, bars and museums
Krakow Hotels - Reviews, photos, panoramas of the cream of Krakow's hotels.
Berlin Wall - A full history of the most enduring symbols of the 20th Century, the Berlin Wall
Vilnius Hotels - Independent reviews, photos and map locations of hotels in Vilnius, Lithuania
Tallinn Bars - Pub, bar, cafe and club reviews and photos. Tallinn's finest drinking venues!
Riga Hotels - Riga hotel guide for accommodation in the Latvian capital
Kiev Nightlife - The lowdown on the sensational Kiev (Kyiv) nightlife. Bar and nightclub reviews
Vienna Restaurants Dining out in Vienna. The cream of Vienna's superb restaurant scene, independently reviewed.
Sopot Hotels - Where to stay in Poland's Tricity of Sopot, Gdansk and Gdynia. Hotels and apartments on the beachfront!
Ljubljana Map- Locate everything you need in Ljubljana with a click of your mouse. Fully interactive map with pinpoint locations of hotels, restaurants and clubs.

other

Krakow Apartments - Amazing apartments for rent in Krakow's medieval Old Town, all at very reasonable prices. See photos and panoramas before you book.