Over on the Gen 5 & 6 Forum, there is a thread that lists different suspension options...although NOT Hybrids specifically. There are several coilovers shown that are available for '07+ Camrys and I was considering going this route rather than just springs.
I
much prefer coilovers to avoid potential problems when using stock dampers with lowering springs. Also coilovers will usually give a better ride/handling balance due to matched springs and damping rate in addition to the ability to adjust ride height to suit personal preferences.
For me, I would like to lower the car no more than about 1 inch, but my main goal is to stiffen up the ride just a bit and improve handling in the process.
No, I don't intend to lose sight of the reason I bought the car in the first place, just want to "improve" it a bit!

Anyways, here is a link to something I would
consider, but am still doing some research...just thought I'd share some info and invite some feedback especially from those who have done the TRD springs.
http://www.d2racingsport.com/type-street.htm#TOYOTA