Dumbledore's gift to Snape and the OOTP

[curlyhornedsnorkack]

No: HPFGUIDX 133985

I think Dumbledore passed something onto Snape when was AK'd. I'm not
sure if it's anything more than the walking, talking shadow that will
appear from Snape's wand from the priori incantatem spell, or if
Rowling has any more methods up her sleeve. Dumbledore, who I believe
was dying at the start of the book, might be able to communicate from
all of his portraits. These include the ones found in the chocolate
frog packaging, which are probably found in the houses of deatheaters
who have children, or who like chocolate. 

Message 133276 from Alon Van Dam suggested reading the following -
it's good!
http://www.livejournal.com/users/garlandgraves/3409.html

It mentions the long gaze before the AK spell as a possible source of
a transfer of something.