Hi Mr Fantastic,
Can't quite do this with one command, but it can be done.

1. Create a blank sheet in your workbook.
2. Activate the sheet you want to 'flip' and select the entire block
of cells that contain you data.
3. Select COPY
4. Activate the blank sheet.
5. Select Cell A1
6. Select Edit, Paste Special
7. Select the 'Transpose' checkbox.
8. Click OK

Note - you can't do this by selecting the whole sheet or whole
columns. Whole rows are ok.
Once you are happy with the new sheet, you can delete the original
one.

Dave.

copy, paste special - and check the transpose box

hth