Sorting

Could you sort this virtual mode grid?

Well, that depends on how much data you have -

IE sorts 10,000 rows in 10 sec, Firefox in 2-3 sec

For large datasets the better solution would be getting the array of row indices in the right order from the server (without re-sending the data itself) as the data is most likely stored in the database and database tables have indices defined for fast sorting/retrieval.