While i haven't tried AHS Riwaka Red Ale, i've used Riwaka hops and can tell you they are citrusy and grapefruit like. I like them.
Secondary: DFH Punkin Ale
Cigar City Jai Alai IPA Clone, Apple Jack 1.0, Apple Jack 2.0
Drinking: Yakima Blonde
(Imperialized), Banana Wheat, Russian Imperial Stout, and anything i can get my hands on
Watermelon Wheat, Red Panda Ale, Gluten Free Brown Ale, Mojito IPA, Smoked Pepper Stout