I still have mine, but I haven't pulled it out in quite a while. It was quite slow, but I remember it using it fondly and really liked the sugar UI (https://sugarlabs.org/). My kids were very young and we had fun messing around with it (there was a nifty audio application that I remember). Another thing I remember about it was the security system, bitfrost, which seemed well thought out. It also had LEDs wired into the mic and camera so you knew when they were listening/watching. I'd really like to see that in other laptops.
This sums up my experience, too. My only real use for it ended up being for weekend/day trips where I didn't need to work and wanted to be quasi-offline but might want to connect to a third-party wifi system (like a motel's) for some light internet browsing.
Anybody still doing anything useful or interesting with theirs?
One of my friends brings either an OLPC or an Alphasmart to Burning Man every year.
In one of my other comments in this thread, I mentioned that I used my olpc to animate this logo [0] and to make a patch adding a dodecahedron to the X.org utility ico [1].
