--June 23 2010: A Bell For Every Minute, an exhibition with Creative Time and Friends of the High Line, opened on the High Line in NYC. The piece will be up for approximately 1 year. There are some photos here and here. Here's a recent BBC Radio feature

--August 13 - September 12, 2010: a project with John Kaldor Public Art Projects in Sydney, Australia. There are some photos here and there.
Also, an outdoor piece, The Birds for the Art Gallery of New South Wales opened on August 11. There was also a performance with Lawrence English at the opening. Kaldor's Facebook page has more details and press links too

--September 18, 2010: performance with Molly Berg at Trinity Cathedral, as part of the 01SJ Biennial, San Jose, CA. Steve Roden and Olivia Block perform on the previous evenings as part of the series

--October 28, 2010-January 30, 2011: solo exhibition at Salina Art Center, Salina, KS

--Stephen Vitiello: Soundtracks, a DVD of collaborations with video artists Eder Santos, Matt Flowers, Andrew Deutsch, Kevin Gallagher, Seoungho Cho and Nic DeSantis on SMTG Ltd

--new mp3 CD-length release Regentag fur Hundertwasser, a collaboration with Andrew Deutsch and Sawako. Also, on iTunes

--a collaborative track with Lawrence English on Cronica compilation (Cronica 50) to come free with Neural magazine late June issue