If it runs Windows 32/64 and understands OpenCL, you will be the man... but, since WCG has to maintain separate builds for ATI and NVidia, there would have to be one for the Phi [kicking the open door], and chances that coming with 1 on the grid asking for work... But, there's the other hurdle to take too... BOINC must be coded to recognize a Phi as co-processor, so you'd have to talk to Dr. David Anderson. The rule is, without exception, no Dr.A consent, no BOINC change. [so much for open source, but then anyone is free to take the BOINC source code from the repository and start coding themselves. Once upon a time some capable folk did and came up with http://code.google.com/p/synecdoche/ but it stranded. One of the coders, a former CA, build an alternate preferences interface which was so much smarter [I've tested it]. Sadly, some things just end up like this http://www.garlikov.com/philosophy/Sisyphus.html (become a CA and you might see a fraction ;P

P.S. I doubt the Intel guy even knew what BOINC was, so he may have been embarrassed on that point ;)