There is a large ongoing project about extending the capabilities and scope of the current Unicode representation of hieroglyphs, which involves many people, both egyptologists and IT specialists.
Mark-Jan Nederhof, the creator of the Revised Encoding Scheme, is very much involve in this project, and has created a preview system for the current Unicode extensions. This system, called HieroJax, is available online here.
Serge Rosmorduc