Latest version is 1.5-r5
released on 2009-11-22
Currently the script handles recommendations for the following:
Slow Query Log
Max Connections
Worker Threads
Memory Usage
Key Buffer
Query Cache
Sort Buffer
Joins
Temp Tables
Table (Open & Definition) Cache
Table Scans (read_buffer)
Table Locking
Innodb Status
via MySQL Tuning Primer Script.