SharePoint 2010: Extend LINQ to SharePoint Provider

One of the cool features of SharePoint 2010 is LINQ to SharePoint Provider which can be used to perform CRUD operations to SharePoint Data with strongly typed objects. LINQ to SharePoint provide simplifies access to SharePoint data and the code also looks very neat. However, at the same time we also need to keep in mind its pitfalls/shortcomings. To me, it is getting