I love rakastae, which were one of the main inspirations for my own cat-people race, the Kathos (you can see a dire-tiger-riding kathos at
http://enworld.cyberstreet.com/hosted/Pozas/Pictures/Wallpapers/tiger_knight_wp.jpg
I wanted them to be LA +0, so I gave them:
Type: Humanoid (they don't have any fancy powers)
Hit Dice: d8-1
Ability adjustments: Dex +2, Wis +2 (they're very agile and have keen senses and instincts); Con -2, Int -2 (like a real-world cat, they're fine-tuned creatures, and any phisiological unbalance wreaks havok with their bodies... Plus, good instincts don't quite help intellectual development).
+2 racial bonus to Balance, Listen and Move Silently
Improved Unarmed Strike as a free feat, and they can choose to do slashing damage (representing vestigial claws).
Favored Class: Monk (kathos lost many of their cat-like qualities during evolution to biped form. those who want focus their minds and bodies to awaken these lost parts of their heritage, devloping sharper claws, fierce combat skills, preternaturally keen senses and amazing speed... so most kathos have at least 1 level of monk)