Do you guys implement IListServer for the BOs and if not, can you point me in the right direction of how to implement this myself?  We are are generating a few really large datasets and it is taking a while to render them without having this implemented.  Thanks!

No, we don't. But you will not want to implement this on a BO directly. You would actually want to implement this on a Custom Binding Source or something along those lines. If you recall, you must call the GetEnumerable() to enumerate a BO and wrap a BO with a BusinessBindingSource to achieve the IBindingList for grid binding. So you will want to follow suite for implementing IListServer. IListServer, if I am not mistaken, is a DevExpress implementation, not .NET. They do this to achieve paging within their grids. I have heard of mixed reviews of trying to implement this, but in any case, it is specific to DevExpress, thus not something that we will implement directly within the framework as this would require too low of a hook. But I would create a custom BBS, then implement the IListServer there most likely. I have not tried this nor have I ever tried to implement this interface, but that should be a good starting point.