Google released an interesting tool for comparing search trends. I tried to compare searches for Czech, Czech Republic, Prague, Brno and Czechoslovakia (see here). It is interesting (if not surprising) to discover that Prague was by far the most common search term followed by Czech. Brno and Czech Republic were about the same but significantly lower. Czechoslovakia is still in there but gratifyingly not too prominent (a lot of people who knew the old name still haven't made the switch).

The tool also records reasons for search spikes which in the last three years were Iraq hostages in 2004 and football World Cup in 2006.

These are the most common regions where searches were made (seems the entire country is engaged in vanity searches):
1. Czech Republic
2. Slovakia
3. Ireland
4. United Kingdom
5. Poland

Searches for Czech language and Czech culture (of most interest to this site) were to small in volume to even register.