For starters, if you haven't read Robert Bogue's open letter to the InfoPath team, do so.

I would have to agree with the premise behind his letter.  InfoPath is incredibly buggy and instead of making life easier, it makes doing anything outside a very simple scenario very hard.

My recommendation across the board is to avoid InfoPath.  Whenever someone starts with a conversation that starts with "we can use InfoPath to...", I immediately begin campaigning for a solution that excludes InfoPath.  Once the problems are highlighted against the possible benefits, it becomes evident that your time and resources are better spent elsewhere.

I've yet to work on a project that includes utilizing InfoPath.  I know that is a hard message to deliver, but I'd rather spend my time (and my client's) working toward something that is much more reliable and is generally easier to maintain in the long run.

-Maurice