A few users used the concept of this list (including: cloudik, pcholody, Mirai_Trunks and qarisu - if I forgot anyone let me know, I'll write your nick here) and created their own. Glad it was useful for some of the last.fm'ers out there!
If you don't understand what it's for, rather than comment on it, do something creative.
1996 ( 1 )
1) Backstreet Boys - 7 IX 1996 - Opera Leśna, Sopot, Poland
2002 ( 2 )
2) Lady Pank - Gdynia, Poland
3) Leszcze - Gdynia, Poland
2003 ( 2 )
4) pidzama porno - Ucho, Gdynia, Poland
5) Kury - 19 XII 2003 - Ucho, Gdynia, Poland
2004 ( 1 )
6) Świetlicki i Ostrowski - 22 II 2004 - Boomtown, Olsztyn, Poland
2005 ( 11 )
7) Tymon & Transistors - Plaża Miejska , Gdynia, Poland