Sideblown or Transverse flutesBelow is an Acrobat file, FluteNotes11 with instructions for making a sideblown or transverse flute in any key or tuning you desire.
To me, these are the most versatile for dynamic range and tonal 'bendability'.
A good place to read ongoing discussion is the flutemakers group on YahooGoups. You will need to ask to join the group, and then can read back threads and receive ongoing discussion emails from the group.