I have been working on non-BMP characters support for Pango for a while:
Notice the screenshot shows a screenful of characters with 5-digit Unicode canonical values. Of course, apart from using a non-BMP-capable Pango, a font that actually has some non-BMP glyphs is also needed.

I see no screenshot here.
Whoa, this post was from nearly 3 years ago… I guess Planet Debian stuffed up again?
Anyways, Pango et al has had non-BMP support for at least a year now.