As pleased as I am with the iWork'08 suite, the new kid on the block, i.e., Numbers, does lack some things I like, or better, that I need. Performance issues aside, Numbers is quite a nitfy tool, provided you let it do the thinking for you. Especially with respect to charts.
Consider the following problem. Given a set of data, containing a few outlying values, create a chart that zooms in on the majority of the data, leaving the outliers off the plot. Cannot do. The Numbers Help has this to say on the matter:
To format the value axis: