[This post is part of a series, "wish-list for future versions of VB"]
IDEA: Use [ ] for arrays. This suggestion came from Bill McCarthy. He writes that it's hard to tell the difference between array-indexing and other uses of parentheses. We could allow  for arrays, or have some other visual differentiation in the IDE. For consistency reasons we'd also have to do it for property parameters. (Also that would remove the user-confusion about how property args are always passed ByVal even though declared ByRef).
Evaluation from VB team: This would be better done by an IDE plugin, rather than by changing the syntax of the language. Now that VS2010 has moved the IDE to WPF, a lot more of these kinds of plugins are possible, and they'll become drastically easier once our "compiler-as-a-service" features progress.