My contact information is available on my user page. I post to the various OSM mailing lists and sometimes on the Polish forums (but much prefer the mailing lists over the forums). I'm usually on IRC in #osm with the nick balrog-kun. My real name is Andrzej Zaborowski but my friends and co-workers call me using local variations of the name Andrew to avoid tongue injuries. I'm a free-software programmer at Intel Corp.
I am recently involved in Kite mapping, I have a subpage about this and related topics.
I usually map in Poland.
I spend a good amount of time in Spain, too (mapping).
I map in random places when I travel or when people on the lists ask for a revert of some change or for help with a rogue relation or during HOT activations, or just because something catches my attention. I map a lot from imagery sitting in my ARMCHAIR. I am all for going out and surveying, but I'm also for not wasting our efforts by not using sources of data that are available. This is why I participated in a number of imports and automated edits, some of them (and one particularly) received mixed reactions.
I've given a number of public talks and presentation about OSM even though I'm really bad at this. My personal blog is at http://unadventure.wordpress.com and I write the OpenStreetMap blog in Polish at http://blog.openstreetmap.pl/
I host http://www.openstreetmap.pl/, which is also accessible through http://www.openstreetmap.hu/ -- I registered .hu the domain to prevent it being taken by a domain troll. I really want to host a Hungarian OpenStreetMap page at that address but I don't speak Hungarian and lack time to do something about it. I'd love it if someone wrote such a page and sent it to me, or at least sent me the translation of another website about OSM. If someone from the Hungary community has hosting for such a page, I will be happy to pass the domain over to them or point it at their server.