Presentations:
Icevault
http://www.icevault.ch/

Coinstax
TBA!

Tokyo Bitcoin Meetup
http://www.meetup.com/Tokyo-Bitcoin-Meetup-Group/

BitPagos
https://www.bitpagos.net/

Bitex
http://Bitex.com.br

Topics:
Bitcoin Banknotes
https://bitcointalk.org/index.php?topic=305590.msg3303025#msg3303025

Titan Bitcoin
https://bitcointalk.org/index.php?topic=311045

Namecoin vulnerability
https://bitcointalk.org/index.php?topic=310954

Libcoin
https://bitcointalk.org/index.php?topic=64344.msg759034#msg759034

Proof of Storage
https://bitcointalk.org/index.php?topic=310323.0

Making hot wallets hard to steal
https://bitcointalk.org/index.php?topic=307211.msg3308565#msg3308565

BIP 38 (passphrase-protected private key)
https://en.bitcoin.it/wiki/BIP_0038