Recently, my colleagues in the lab have published open access papers describing their work on various TRP channels.
One, headed up by Sebastian Brauchi (a former postdoc in the lab, who now has his own lab in Chile) and Grigory Krapivinsky, describes the role of TRPM7 on cholinergic vesicle fusion. It was published as open access in PNAS. Download it here.
The second describes work by Stephanie Stotz and colleagues on the sensory transduction mechanisms elicted by the chemical citral (a component of lemongrass). They found multiple effects of citral on a number of TRP channels expressed in sensory neurons, and published their work in PLoSOne. Get it here.
Yay for open access! Actually though, my advisor David always self-archives all of his publications, and they're available at the lab website here.