I have a v2 blade erupter on a mac successfully running at Slush's pool.
I was able to download the .exe file from
https://mining.bitcoin.cz/mining-proxy-howto and clicking on the .exe link.
The blade's configuration has to point to the IP address of the proxy under Server addresses:
Ports: 8332,8332
Server Addresses: your proxy PC's IP address, your proxy PC's IP address
user:pass: username.worker1:password,username.worker1:password
Blade port 8332 ---->Proxy(PC 'server' running mining_proxy.py) port 3333 ----> Slush's Pool