Am moving crystal reports to reporting services in anger. Am discovering the following points as I go along that may be interesting to others doing the same. If anyone knows something I have said is wrong, or wants to add a useful tip please feel free to comment as I am hoping other new RS users will find this thread useful.

Multi-column reports dont show up in preview mode, excel or html, only pdf, print preview and print.
Multi-column reports dont work in subreports.
If you needed a multi-column report dont worry, just break up your rows of data into a new dataset with n*2 columns and put them into a normal table in your report.

HTML and RTF interpretation cant yet be done but I understand will be possible in the near future as many people have requested it.

Dundas charts (or any other image for that matter) can usefully be put into these reports by adding the image they render into a dataset System.Byte() column, using this as the source for an embedded image and setting its mime type and source in the report.

It doesnt seem to be possible to break a single text box at a given height and wrap it into a second column, this was possible in crystal if a multi-column subreport was forced to a maximum height in the outer report, that subreport had a single text field in it, and the text field property was not 'keep together'. The nearest solution we can find is to break the data into multi-dataset columns before it reaches RS, either on a fixed number of characters or at a user defined location in the text.

Hopefully will soon find a way to change which subreport is shown in the main report dynamically, e.g. by using code or parameters.