check out david byrne's 'playing the building' project. oh yeah!

before byrne did his project, there was a group in l.a. that strung up parts of the building around some exterior terrace space at the disney concert hall and played it.

they may have done other projects before i saw this one, but they did a performance when i was in l.a. in late 2003.

sorry to be so non-specific, but there's also a project up in the northeast somewhere where they're 'playing' the interior spaces of some old silos, using them as an instrument. i think the project is web-based, so you should be able to find it.

here's a music thing similar to what steven mentioned:

doublends vert - cistern

"Cistern was made in a two million gallon underground reservoir at Fort Worden, a de-commissioned military base overlooking the entrance to the Puget Sound. The space's resonance extended the instruments in a way similar to electronic processing. The acoustic properties of the cistern created new sonic relationships to which the group applied their musical concept. Cistern captures Doublends Vert's first experiences in the sound-world of the cistern. Doublends Vert formed in 2003 through a common interest in creating restrained, acoustic music exploring the timbre blending possibilities of the violin, accordion, and clarinet."

I suppose you checked the Pamphlet issue Architecture as a translation of music? Also check out Max Neuhaus, his work is amazing.
and if you're after a more 1:1 approach there were these two former Gehry architects who made a pavillion or museum using sound to generate the form, their name slipped my mind. And also pretty literal, I just stumbled upon Jesper Bonde, an architect and musician.