Development Roadmap of Bitcoin Core 0.9.2
https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg04952.html

BIP70 implementation guidance
http://article.gmane.org/gmane.comp.bitcoin.devel/5258/match=

Github Pull Requests/Issues
https://github.com/bitcoin/bitcoin/issues/4082
https://github.com/bitcoin/bitcoin/pull/4127
https://github.com/bitcoin/bitcoin/pull/4122
https://github.com/bitcoin/bitcoin/pull/4121
https://github.com/bitcoin/bitcoin/pull/4104
https://github.com/bitcoin/bitcoin/pull/4102
https://github.com/bitcoin/bitcoin/pull/4100
https://github.com/bitcoin/bitcoin/issues/4124

Eliminating double-spends with two-party self-escrow for high value transactions
http://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg05166.html

Tree Chains v. Side Chains
https://soundcloud.com/mindtomatter/ltb-e104-tree-chains-with

Full Node Statistics
http://coinchomp.com/2014/04/27/peeking-hood-running-bitcoin-node/

Weekly Hash Rate Stats
http://organofcorti.blogspot.com/2014/04/april-27th-2014-weekly-hashrate.html
 
Coinbase reallocation to discourage Finney attacks (no words for this one)
https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg04972.html
http://bitcoinism.blogspot.com/2014/04/dirty-deals-in-smoke-filled-rooms.html
http://www.reddit.com/r/Bitcoin/comments/23rbi0/bitcoindevelopment_coinbase_reallocation_to/ch01e27

Replace-by-fee scorched-earth without child-pays-for-parent
http://sourceforge.net/p/bitcoin/mailman/message/32276657/

New BIP32 structure for P2SH multisig wallets
https://www.mail-archive.com/bitcoin-development@lists.sourceforge.net/msg05156.html

bitcoinjs-lib K value generation issues
Bojan will speak to this, if not I will.

SX Command Line Utilities (new HD Key Commands):
https://wiki.unsystem.net/index.php/Sx/HD_keys

BIP Draft: Atomic Cross Chain Transfer Protocol
https://github.com/TierNolan/bips/blob/bip4x/bip-atom.mediawiki

SPV-grade block provider
https://bitcointalk.org/index.php?topic=596010.0

mbits vs. bits vs. bitcoin vs. ___? Pick your poison.
Too many disparate discussions to list.

Launch a full Bitcoin node on Digital Ocean’s network in 1 click
http://www.reddit.com/r/Bitcoin/comments/24rkzq/launch_a_full_bitcoin_node_on_digital_oceans/ 

Stealth addresses in bitcoinj

https://medium.com/p/cb2f81962c1b

Bitcoinj Watch only branch https://github.com/devrandom/bitcoinj/tree/watcher_service1

Tools/Misc:

NBitcoin (C#) [probably not battle tested]
https://github.com/NicolasDorier/NBitcoin

MonoBitcoind (Mono/C# Wrapper) [probably not battle tested]
https://github.com/nrjudson/MonoBitcoind

Integrating Bitcoin Daemon with PHP
https://bitcointalk.org/index.php?topic=412425.0

AppeCoin (draft)
https://bitslog.files.wordpress.com/2014/04/appecoin28.pdf

Private Aytomatic Miner Backbone Protocol (PAMBA) - didn’t talk about this last time
https://bitslog.wordpress.com/2014/04/19/the-private-automatic-miner-backbone-protocol-pamba/

DECOR Protocol
http://bitslog.wordpress.com/2014/05/02/decor/

SmartSPV
https://bitslog.wordpress.com/2014/04/25/smartspv-a-better-simplified-payment-verification-for-smartphones/

Cantor Pairing Function to combine different addresses
https://bitcointalk.org/index.php?topic=589863.0

Deep Technical Dive into Bitcore with Eric Martindale
https://www.youtube.com/watch?v=mmhvaTVaAk8

TruthCoin
https://github.com/psztorc/Truthcoin

Presentations:

Adam - http://counterparty.co/

Rodrigo - BitEx (follow up presentation)