In Ye Olde Days, I used Kenad Broki's excel sheet, and it worked pretty well.  I have no doubt I'd hunt down the next big thing if I run it in the future!
Skill Focus is a part of it, but it's overall problematic because the skill system - Focused or not - starts out way more badass than the attack system.  So, low-level Jedi are far better off using Force powers offensively than they are using Lightsabers.  This is, more or less, exactly the opposite of how I want it.  (Skill Focus just exacerbates something that's already a problem.)  Ideally, both should be viable through all levels.  I'd like to see Force Powers follow a more uniform attack-bonus-style system.
The crippled nature of melee combat makes lightsabers an even worse choice.  I'd need to fix that, too - probably by using the 4e action system.
Otherwise, I dig the mechanics.  It's my favorite iteration of the d20 system.