[olpc-help] Can't Connect 2 XOs with Mesh

[JBFerg]

I have two XOs and have been successful at connecting them both to the internet via a Wifi router.  But I've noticed that the two do not appear in the neighborhood view as I expected.  Does anyone know if the XO will not connect to another XO via mesh once it has established a Wifi connection?

Or more generally, has anyone had any good results getting 2 or more XOs to share activities?