Marin Pt. Reyes, Gary Fisher HiFi Pro, Easy Racers Gold Rush recumbent, Cannondale F600
The nice thing about Portland is you have such a wide variety of rides... you can make them as flat or as hilly as you like. There's a MUP that parallels Marine View Drive along the Columbia River, it's a pleasant flat cruise with great views of Mount Hood, St. Helens, and of course the river. It can get windy, though. Other flat rides include the paths along either side of the Willamette River downtown, and the Springwater rail to trail path southeast of there. I don't live there (too bad) so I can't advise you on local riding groups.