Here's an AppleScript that will take a simple text object and create multiple text objects which represent all it's lines.
I use this to paste in a list of site map objects from (eg.) an email or a spreadsheet, and quickly generate separate text objects for me to then join up.
If I have a very long nested list I'll instead import into OmniOutliner, save as an outline, then open in OmniGraffle, create the outline, and copy/paste into my real document. As you can see, that path isn't worth it for a dozen lines or so.
Code:
tell application id "OGfl"
tell front window
set theSelection to the selection
set theItem to item 1 of theSelection
set theText to (text of theItem) as text
set theSize to size of theItem
set theHeight to item 2 of theSize
set theOrigin to the origin of theItem
end tell
set theDown to (item 2 of theOrigin) + theHeight
set theRight to item 1 of theOrigin
set theLines to paragraphs of theText
set numLines to length of theLines
repeat with lineNo from 1 to numLines
set theDown to theDown + 16
set theOrigin to {theRight, theDown}
set theLine to item lineNo of theLines
tell canvas of front window
make new shape at end of graphics with properties {draws stroke:false, fill:no fill, origin:theOrigin, vertical padding:0, autosizing:full, size:{180.0, 13.0}, text:{text:theLine, size:11}, side padding:1, draws shadow:false}
end tell
end repeat
end tell