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