Malhavoc also has a couple of 3.0 psionics materials that are great, such as If Thoughts Could Kill and Mindscapes (most of which, if not all, was updated in Hyperconcious).
There's a 3.0 Psionics Toolkit out there as well. Green Ronin has Mindshadows, a psionic setting book based somewhat on India, and Monsters of the Mind, a psionic bestiary.
There are several other products out there too, but the one that gets my highest recommendation is Hyperconscious. Beyond the Expanded Psionics Handbook, I recommend it the most.