LINQ and its diverse incarnations

LINQ as a concept is highly extensible and every now and then a new LINQ to WhatEverYouWant gets announced. Just a few examples to show how fast people are adopting this technology: LINQ to LLBLGEN, LINQ to NHibernate, LINQ to Filckr, LINQ to Amazon, etc. Within a few days I've come across 3 more projects:

• SyncLinq - it returns collections that implement INotifyCollectionChanged which lets you track changes
• PLinq - it lets you specify that a given LINQ statement should be executed concurrently and it's up to the runtime to decide how many CPUs will be used
• DryadLinq - the same as PLinq, just replace CPU with PC, basically it lets you specify that your query should be executed on many machines

It looks like LINQ is a powerful platform itself. It has enabled people to create many different levels of abstractions that are based on nearly the same syntax. It's amazing because if I want to stay close to bare metal I can go for Linq, if I want to get some additional services like change tracking I can go for SyncLinq. If I want to take advantage of my N > 1 cores without messing with threads I can go for PLinq and finally if I have N > 1 machines that nobody uses :) I would definitely go for DryadLinq. Diversity in its best shape.