The work I did on benchmarking DataTable performance (or lack thereof *cough cough*) has been published in an article on the MSDN VB Dev Center.
For those of you wondering about the results I mentioned a few months ago, they're included there. I've also included some work on benchmarking LINQ select queries and aggregation in comparison to the DataTable equivalents.
Many thanks to Beth Massi for helping get this published.