EntityFramework 6 Alpha 2 e connettore MySQL/NET 6.6.4

aggiungilo semplicemente al tuo web.config

  <system.data>
    <DbProviderFactories>
      <remove invariant="MySql.Data.MySqlClient" />
      <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.6.4.0" />
    </DbProviderFactories>
  </system.data>

  <entityFramework>
    <providers>
      <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.6.4.0" >
      </provider>
    </providers>
  </entityFramework>

ma non penso che tu possa usare 6.6.4 con EF6...