The AstroParticle & Cosmic Radiation Detector Research & Development Laboratory (APCR-DRDL) has just announced they are accepting bitcoin donations:

https://twitter.com/APCRDRDL/status/192727636768849920

<shameless plug>And I've sent them a small btc tip:

https://twitter.com/AminCad/status/192757106238177280</shameless plug>

*Edit, I just learned that this isn't something new. They've actually been taking bitcoin donations since August:

https://twitter.com/APCRDRDL/status/105783157651030017