Reading through the OLPC News Forum thread "How do we like [the XO laptop] now" I am struck by how much XO laptop hacking is going on. Just read the first comment on how david_kw modified his OLPC:
I admit I've had to do some fairly serious additions to make it useful for me (like adding opera, flash, xpdf, compilers, different terminal "activity", got rid of the auto-surround menu, and a few others), but I've been impressed the way the hardware has handled all those changes.
I was worried that I'd be locked in to the delivered software, but that has not be the case at all.
I also suspect OLPC also wanted cool laptops they could hack themselves. Just listen to Pixel Fish interviewing Walter Bender on how he uses his XO laptop. Do you even recognize all the software he's added?
Over in the OLPC News XO Hacking Forum the modifications get crazy, with both software and hardware. Here's a few of my favorites:
Better yet, be sure to share your success (and challenges) with us all in the OLPC News XO Laptop Forum - we all want to celebrate XO hacks.