Sorry, for the general summary. Straight forwardness from now on: here
comes the ChangeLog :-)

* api_status.txt: Reflect recent API additions to pangomm.
* TODO: copy the TODO's from this ChangeLog.
* tools/pm/DocParser.pm: Comment out conditional if-clause
around conversion from C documentation to C++. It prevented
conversion of the documentation in *_docs_override.xml which
currently is in the same style as *_docs.xml and lead to
mistakes in our overridden gtk documentation.
* pangomm/src/attributes.hg: Make Attr* default constructors
protected. They don't produce legal attribute objects.
Attribute::Attribute() produces an object with gobject_==0.
This is handled as if it were an attribute of type ATTR_INVALID
and allows wrapping of NULL return values from pango c functions.
* pangomm/src/attriter.ccg: Correct possible bug in
AttrIter::get_font(). (Taken a hint in pagno c ref doc serious :)
* pangomm/src/attrlist.hg: Add default argument for: explicit
AttrList::AttrList(const Glib::ustring&, gunichar accel_marker=0).
* pangomm/src/context.hg:
 - Remove _WRAP_CREATE(). It can't
  possibly initialize the Pango::Context object correctly because
  some PangoFontMap is needed from a pango backend.
- Add default argument Language() for the language parameter of
  Context::get_metrics. TODO: Use a function overload instead.
* pangomm/src/coverage.{hg,ccg}: - Change Coverage::to_bytes()
to return a Glib::ArrayHandle<unsigned char> instead of an
guchar* array that needs to be freed with g_free() by hand.
- Remove Coverage::copy(). The pango docs state that is is
  superfluous.
* pangomm/src/font.hg:
- Add default argument Language() for the
  language parameter of Font::get_metrics().
  TODO: Use a function overload instead.
- TODO: Ask list whether we really need
  Font::get_glyph_extents_{ink,logical}_rect_only().
* pangomm/src/fontdescription.hg: TODO: Investigate the following:
FontDescription::{set_family_static,merge_static} look as
if they could lead to undefined results and corrupted data.
* pangomm/src/glyph.{hg,ccg}:
- Add Glib::wrap(PangoGlyphInfo*). I forget it last time.
- Comment out set_* in GlyphInfo and GlyphGeometry. They don't make sense
  as GlyphInfo and GlyphGeometry are merely output classes to the user.
* pangomm/src/glyphstring.{hg,ccg}:
- Add GlyphString::GlyphString(const Glib::ustring&, const Analysis&).
  This wraps pango_shape which didn't do up to now.
- Make GlyphString::get_logical_widths, GlyphString::index_to_x and
  GlyphString::x_to_index calculate take the size of the passed text
  parameter from the Glib::ustring itself rather than demanding an
  extra argument. GlyphString::get_logical_width now allocaltes an
  array to store the results rather than expecting the user to do this.
* pangomm/src/item.{hg,ccg}: Add Item::get_segment() and Item::shape().
  The former computes the text segment that is covered by the item
  (convenience one-line-function not available in pango), the latter
  wraps the new GlyphString constructor and thus pango_shape().
* pangomm/src/language.{hg,ccg}:
- Add Language::Language() that constructs an object with gobject_==0.
- Adapt Language::get_string to allow for objects with gobjct_==0.
- TODO: Change const char* into std::string.
* pangomm/src/layout.ccg: Bug fix: use text.bytes() instead of ext.size().
* pangomm/src/layout.hg: Bug fix: use refreturn parameter of _WRAP_METHOD
for Layout::get_context() and Layout::get_line().
* pangomm/src/layoutiter.hg: Bug fix: use refreturn parameter of
_WRAP_METHOD for LayoutIter::get_line().
* pangomm/src/{*.hg,*.ccg}: Add lots of documentation.
I hope that some things I had to learn the hard way become clear
in the class description of Pango::Context.