How to insert binary data into a PostgreSQL BYTEA column using the C++ libpqxx API?

I'd like to insert some binary data into a BYTEA column, but I find the Doxygen output is lacking in details, and http://pqxx.org/ has been down for the past few days.

How would I go about inserting the contents of somefile.bin into a table with a BYTEA column?

What I have is along these lines:

pqxx::work work( conn );
work.exec( "CREATE TABLE test ( name varchar(20), data BYTEA )" );
work.exec( "INSERT INTO test( name, data ) VALUES ( 'foo', <insert filename.bin here> )" );
work.commit();

If it makes a difference, I'd like to use the new hex format for BYTEA available in PostgreSQL 9.1.