There was some discussion on the BOINC Dev mailing list this week about people working on an iPad port of BOINC.
I paid a developer to port BOINC to the iPad. Unfortunately he didn't finish it so the source is incomplete. It consists of an RAR archive containing an Xcode 10.6 project with the 3 support libraries (c-ares, curl and wxWidgets) required to compile BOINC. He did not do the GUI, nor did he complete the code conversion to Objective C so its quite likely useless. I don't have a Mac so can't test it.
You can download from here: http://augurtbbs.com.au/downloads/dlindex.html
Warning: Its 128 Mb in size