I've been thinking about the same thing actually. But been wondering if that's really worth it.

I have a 12-inch PowerBook G4 (1.33GHz), but than, it is a PowerPC by the end of the day, and applications are getting more and more limited, especially I have a MacBook Pro and 2011 model MacBook Air.

The biggest issue is that I've never opened a PowerBook and the number of screws seems a bit complicated.

Please let us know how you went with the SSD.