There are products which monitor/audit AD changes, however they are expensive enterprise-level products, which will typically require a SQL backend and significant storage.
As mrdenny said, this can be done programmatically (in any language with AD/LDAP hooks) and present the output in xml format. (RSS is essentially an xml document containing a directory listing of articles.)
If you have a serious need to do auditing, I recommend beginning with a search for "Active Directory Change Auditing", otherwise I'd stick to a scripted solution. Microsoft's Technet Script Center Repository has a lot of code that people have offered for free to get you started.
If you use the Quest Active Directory PowerShell extensions you can easily enough query for all the new/changed users, computers, etc.
There are products which monitor/audit AD changes, however they are expensive enterprise-level products, which will typically require a SQL backend and significant storage.
As mrdenny said, this can be done programmatically (in any language with AD/LDAP hooks) and present the output in xml format. (RSS is essentially an xml document containing a directory listing of articles.)
If you have a serious need to do auditing, I recommend beginning with a search for "Active Directory Change Auditing", otherwise I'd stick to a scripted solution. Microsoft's Technet Script Center Repository has a lot of code that people have offered for free to get you started.