finally some "local" information about UW gig in Riga.
http://www.propeller.lv/posts/underworld_massive!/
this is the site of the concert agency that will organize the concert in Riga. as i understand, the agency is relatively new, so.. i can't tell for sure how good or bad, for that matter, the organization of the gig will be. still no information about the tickets :/
*edited*
uh, i've finally used my brains and explored the site a little. this agency has very good partners, with whom other such agencies work as well. that should clear any doubt about the quality of the organization. it should be really nice.