The hardware specifications of the OLPC are close to the iLiad: they design for a 366 Mhz processor and a 1200 × 900 Xwindows reflective monochrome mode in the Display. Note "reflective monochrome": the original idea was to use eInk.
Now, the people has already a fine repository of applications:
http://dev.laptop.org/git.do?
For instance chech this:
http://wiki.laptop.org/go/TamTam
it could work directly in the iLiad.
or this
http://wiki.laptop.org/go/Musical_Editor