I've had version 10 for a few months but it wasn't until today that I really tested the 3D Analyst extension. (Other then visualizing data)
I already noticed a lot of changes; a number of tools have been re-named or re-worked all together which also impacts my usual work-flow.
I will not list all the details but the question is whether the 'TIN format' has been superseded by the improved 'Terrain Dataset'? Should I be using terrain datasets now even for simple surfaces?
Example: Hardclip and Softclip functions do now work in version 10 (as far as I can tell) and I noticed that defining the edges of a TIN dataset should be accomplished by using the 'Deliniate TIN Data Area' tool instead. However, to do this Average Point Spacing is required. Strangely this needs to be obtained from the input XYZ file not from the TIN itself. Alternatively, knowledge of the data is needed to take some manual measurements and to estimate the average spacing. This information is also needed to create a Terrain Dataset so it might be easier to just migrate to Terrain Datasets all together. But, di functions such as 'Extrude Between' support Terrain Datasets? TIN not processed with 'Delineate TIN Data Area' yields very strange contour results so it looks like things have to be done this way.