well i would hold off any scrypt investments until this...
https://bitcointalk.org/index.php?topic=985400.0pretty impressive i'd say..
The SF3301 fully utilizes the advantages of the FD-SOI technology. With increased forward body bias the chip is operational at lower voltages while maintaining a higher frequency. The chip boasts impressive power efficiency while affording high hash power, allowing for much lower wastage per hash. The ASIC’s lowest working voltage is 0.45V, with lowest BTC efficiency at 0.19J/GH, and lowest LTC efficiency at
1.75J/MH. In current market conditions compared to other mining technology, dual-algorithm capabilities can provide a clear advantage.
After strenuous testing of the SF3301, we reached hashrates of 152GH/s for SHA-256 and
3.17MH/s for Scrypt.