Every thought about working with elements in two sequences in a aggregated way similar to the way a zipper works with the two panels of teeth?  The Zip operation for LINQ in C# 4.0 will do just that.

Bart De Smet’s blog covers the topic: http://community.bartdesmet.net/blogs/bart/archive/2008/11/03/c-4-0-feature-focus-part-3-intermezzo-linq-s-new-zip-operator.aspx