I don't know man. All the info on the official mozzilla links say supports fennec beta 2, no mention of alpha 2. The windows mobile fennec is Alpha 2. Beta is for the nokia device isnt it? Could it be a fail post by wmpowerusers? After all, they did take it straight from lifehacker... on lifehacker they say "This version of Weave also works with
the Fennec mobile browser 1.0 beta 2, just released for (touchscreen) Windows Mobile and Maemo devices." I think they're both confused?
let me know if i'm wrong, peace.