Richard Tallent gives his reasons that he doesn't like InfoPath. I have to agree with several of them - I think that the lack of .NET support is probably the biggest killer. Personally I'm not a fan of XSL and so I don't like the internal architecture of InfoPath. With that said, I still think that InfoPath will be an amazing product for a certain type of task. It isn't yet ready to be a full developer tool, but hopefully it will grow into one - or perhaps spawn a new tool from the Developer Division that tackles XML programming in this fashion?