ArcGIS for AutoCAD 300 Service Pack 1 offers faster loading and introduces support for AutoCAD 2013 (64-bit and 32-bit).
Proxy servers that connect to the internet for ArcGIS services are supported. SQL server authentication in combination with support for Windows token authentication/proxy server is available.
In addition, language options including Chinese, French, German, Italian, Japanese, Portuguese (Brazil),Russian, and Spanish are now available.