I never did this, but I've read on this mailing list I think that it is possible to have someone be your library/feature "champion" IF he/she believes him/herself in the proposal and is already attending a commitee meeting.
Someone from the commitee could confirm or infirm this.
That's also one of the original charters of Boost. It is a framework for proposing, developing, and grooming libraries for C++ standard libraries. Many of the TR1 and many more of the libraries planned for TR2 were developed in Boost. I'm not entirely sure what PCL is yet. At this time, there are no clearly defined scope, goals, framework, process, or libraries. But there does seem to be some idea to provide -- for lack of any better term at this time -- a repository for corporate "donations" into the standardization process. The details are still being fleshed out. If you are interested in having libraries made part of the standard, Boost is still the most direct route. There are several people in the Boost community that could champion libraries. It might be great if there were more. Perhaps this would be a good time to start collecting information about what kinds of libraries we think the standard needs, who's going to write them, and how we're going to get them into the standard. What would make your jobs easier? Andrew