Internet Printing Protocol (IPP) for Java ?

Now that JDK 1.4 has introduced the javax.print with IPP-like semantics and properties, why haven't we yet seen an IPPPrintService and IPPLookupService ?

I've searched high and low for such a beast, but with no real luck.

This site mentions something that sound like they have done it, but there is no response when asking them for details :(

In some bug-reports on there is small comments on "maybe in 1.5", which sounds interesting, but why not before ? Why not as an experimental addon...? It would be so sweet :)