Yes in fact they are 0.3.1!!! I've got the tempest ones working with the exception of a few:
Armor Sliver
Barbed Sliver
The "lord" ability doesn't seem to work with the standard cost:n/m scripting. I can obviously get it's own ability to work with auto={2}:1/0 However auto=lord(Sliver) {2}:1/0 simply gives all the other slivers +1/0 automatically without making it a pumpable ability.
Mnemonic Sliver
Mindwhip Sliver
These 2 I havn't looked into yet, as I'm not sure sacrificing a creature to activate an ability is even possible right now, although even if it is, I'm sure that it would still have the same problems as the Armor and Barbed slivers...
The other ones work great and are almost too powerful for the current AI decks... I've been playing with just the slivers added and only in rare occasions ever lost... 3 muscle slivers a winged sliver and a talon sliver is quite impressive haha.
I've been out of the scene for a while and I'm not sure if there's been a Tempest release. If not, I should have one either tonight or tomorrow night... the _cards.dat file takes a while to input 300+ cards. XD
If anyone has a _cards.dat file set up, or partially set up, it would be appreciated and would probably speed up the process... Stronghold is my other project right now, but those slivers might not be possible yet. Cant wait for the Queen and Tokens
