INAE, but could you not persist the connection, sleeping in between batches and wrapping each batch in a table.

Does a mostly sleeping, persistant connection unduly tax Apache?

Don't most (many, all) browsers render a table as soon as it's complete?

The format of the links wouldn't have to change. Just put <table><tr><td> at the top of each batch and close it at the bottom, before sleeping for a few seconds then looping back to do the next batch.

...heading back to Barcelona.