[taos]

I suppose it's not too bad: For every page with scribbles there are two files, a pseudo svg (input file for NoteToSvg) and a minuscule thumbnail png file with the same name (but different extension) in Sony_Reader/database/cache/books/CONTENT_ID/markup. The file name corresponds to the entries in columns "svg_file" and "thumbnail" of table "freehand" in PRS-T1's books.db (Sony_Reader/database/books.db). Thankfully, there is also a "page" column (cell data shows "0.9999" for page 1 and "1.9999" for page 2). IIRC from playing around with text annotations in epubs, this entry is always x - 0.0001 for page x - so not too difficult to find...
BTW, "content_id" in "freehand" table corresponds to "_id" of "books" table where you can find "title" and "author" of your annotated pdf file.