Preferred way to contact me is using email - michal@cihar.com.
PGP
To send me encrypted email, please use following PGP key:
63CB 1DF1 EF12 CF2A C0EE 5A32 9C27 B313 42B7 511DJabber
For urgent stuff you might want to use jabber - michal@cihar.com.
IRC
You can find me on FreeNode network as nijel.
Snail mail
Last possibility that (sometimes) works is snail mail:
Michal Čihař Zdiměřická 1439/8 149 00 - Praha 4 Czech Republic