Hi Don,
There's no completely right answer to this, and the answer you'll likely get to is some mix between the two.
In NetTalk there's already a fair mix between the two - we have a number of server-side features (like sorting, locating etc) and a number of client-side features (mouse-over, greenbar, clicks) and so on.
>> I want things like merged cells,
already supported (server side)
>> floating cells,
not sure what "floating cells" are...
>> calculations on cell values
also already supported server side...
cheers
Bruce