I've just upgraded my Macbook Air Rev B with a Runcore 128GB SSD. Whilst the upgrade went well and things seem nice and fast (like a totally different machine!) I am getting the same hangs described here. The difference is I'm still running Leopard (10.5.8).
It usually hangs when coming back from sleep, and similar to described above is seems to be OK, and the pointer moves about, but then clicking on a window and it seems to not respond correctly, then you get the beach ball spinning and nothing responds anymore. Only thing for it is to hold the power button down until it shuts down and reboot it.
I've emailed RunCore and hopefully they can offer some more info.
-Matt