This picture is from Snitch Seeker, and more can be found here (they’re watermarked, so I can’t display them here): http://www.snitchseeker.com/gallery/thumbnails.php?album=1411 . 
Also, some pics from a Showmasters thread:
 
OMG the little boy is cute! That’s definitely Frank’s biggest smile, the picture with the kid in it.;)
Some comments people made about the photos of Frank: “Gosh, he is gorgeous!” “I think Frank [...]

Jamie Campbell Bower, who auditioned for the role of the teenage Tom Riddle in Harry Potter and the Half Blood Prince, talks about not getting the role but also of being invited to play Grindelwald in Harry Potter and the Deathly Hallows.
Are you happy that you snuck in under the wire to be a part [...]

Critics Lisa Schwarzbam and Owen Gleiberman discuss the movie Harry Potter and the Half Blood Prince. They even praise Frank Dillane (5:20)!

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Owen: “I will say one thing for one of the actors in this film, and it’s not Rupert Grint-”
Lisa: ”I hope it’s, I know, I hope it’s-”
Owen: “It’s not Rupert Grint; every time he shows up, I’m [...]

This video only shows Frank for about 20 seconds in the beginning, so don’t expect to go through the whole 10 minutes and see more of him! But it’s a cool unedited shot of his first line, “Sir, is it true Professor Merrythought is retiring?” The rest of the video goes behind-the-scenes of [...]

On April 14, 2009 Jakub, a fan from Slovakia, sent Frank a letter, a self-addresses envelope, a photo of Frank and a silver marker.  On may 11, 2009 he received a letter back!
WOW! Jakub said part of the letter is covered up because Frank “wrote that he is not supposed to tell something about movie, [...]

As you probably know, there are quite a few Tom Riddle photos with foreign languages on them. Here’s what we’ve translated:

Top left:
Young Tom Riddle:
“Born in an orphanage and described by the Director as ’strange’ and capable of ‘doing things’ to the other children, Tom Riddle is thereby surprised to learn, through Dumbledore, that there are [...]

Alright, I’m sure many of you have been wanting this! It’s the full, combined script to Tom Riddle’s scenes in HP&HBP.
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Tom Riddle: Sir, is it true Professor Merrythought is retiring?
Slughorn: Now Tom, I couldn’t tell you if I knew, could I? By the way, thank you for the pineapple, you’re quite right, it is [...]