making ACS (using portal config) issuein SAML 2 NameID

Question

It was possible to make ADFS produce a SAML1 token with a subject field, bearing a nameid field (of format undefined).

Can one do the same when the azure portal of ACS v2 to configure the rule group of a given RP?

If I alternatively built my own configuration tool (such as that which claimid codeplex site showcases for configuring a custom openid provider IDP), can I use the same rule from ADFS in ACS, using the (ADFS) rule language:

 

c:[Type == "http://schemas.microsoft.com/ws/2008/06/identity/claims/windowsaccountname"]
 => issue(Type = "http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier", Issuer = c.Issuer, OriginalIssuer = c.OriginalIssuer, Value = c.Value, ValueType = c.ValueType, Properties["http://schemas.xmlsoap.org/ws/2005/05/identity/claimproperties/format"] = "urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified");