Oracle has finally announced the long time pending MySQL 5.5 as GA. The 5.5x branch has the following super improvements.

• Super Fast & Stable Innodb: Code from Innodb plugin 1.0.4x onwards, Multiple Read and Write threads for Innodb, Native Async I/O in linux. more…
• Semi Synchronous Replication: Ability to make sure the data committed to master has atleast reached one Slave Node: more…
• .. and more fixes.

uuhhoooo.. !!!