I created this mixed wood wall with cheap wood paneling from Lowes, leftover stain and paneling nails for around $40. http://UncookieCutter.com

Mixed Wood Wall - Easy & Cheap DIY

Palletless Pallet wall.  Check out her home improvement/decor blog at Creativelittledaisy.com

this is one of the most beautiful plank walls i've seen! The product I used for my wood plank wall is v groove wood planks by EverTrue, sold in packs of 6 eight foot long planks.