I do not know if you noticed it, but Google (Mark Callaghan, Justin Tolmer and their internal mysql-team) made a great contribution to MySQL. Patches global transaction IDs, binlog event checksums and crash-safe replication state are separated and published on Launchpad (https://code.launchpad.net/~jtolmer/mysql-server/global-trx-ids).
For me it was a big wall in using these patches that they were part of one big patch, which you can apply only to 5.0.37, and now there is no barrier to include patches into our builds or MySQL releases.
If you do not know what is Global Transactional ID is – it is worth to look http://code.google.com/p/google-mysql-tools/wiki/GlobalTransactionIds. From my point of view – it is absolutely new view on MySQL replication and it can change MySQL replication architecture.
We definitely will look if we can integrate patches into percona builds and provide binaries if there is no problems. Also I mostly sure the patches will be included into MariaDB along with other Percona-improvements and XtraDB storage engine.