From b35.5_x86 and b35.8_x64.
I looked into changelogs (both vvvv and addonpack), but the node does not seem to be mentioned.
In b34.2_x86 the node is there, pointing to a dll in addonpack; the more recent versions point to vvvv.nodes.dll, into which I can't find it (with that name at least).
So, has the node been removed? Has been substituted?