I don't know anything about Ruby, but I can tell you that n-tier is still here and should be used to create robust applications.
>
>I'm beginning to think that:
>
>1. nTier was a temporary stepping stone and is soon becoming obselete.
>and
>2. languages like Ruby are a better bet than .NET and more ripe for major innovations.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer