As mentioned last year the Bing Ads V8 API will be removed in June 2014. Please migrate your applications from v8 to v9 at your earliest convenience. To help with your migration, we have provided a guide for Migrating from Bing Ads API Version 8 to Version 9
Please use the the provided V9 API sandbox that you can use to test your migrated application. For information about the V9 API sandbox, see Sandbox.
Can you clarify when exactly in June you plan to sunset?