I've just been enjoying a bottle of Porter I brought back with me from my visit to Prague last September. Pardubicky Porter 19 Originalni Tmave Pivo - Original Dark Beer. I can't remember exactly where I bought it, but I think it may have been in Tesco's large outlet in the centre of Prague, of all places!
It's a bit of a mouthful both in name and beer wise, but seeing as I'd be saving this one for some time. it was well worth the wait when I finally opened it. Rich, velvety-chocolate overtones, balanced with a background of roasted barley and brewed at a decent strength of 8.0% abv. There is a nice warming feel to the beer as well, despite my serving it chilled.
From a land famed for its golden, Pilsner-style lagers, this dark, traditional porter is a real eye-opener, and a thoroughly excellent beer. I noticed that Boak and Bailey posted on this beer, amongst others, back in 2008, so it's not that new.
Whilst on the subject of non-indigenous beers, I remember now that I enjoyed a 6.3% IPA at the Strahov Kloster Monastery, near Prague Castle, on the same trip, so it looks as if the Czechs are, like other nations, experimenting with other beer styles. Interesting!