I use http://drupal.org/project/views_datasource to get a JSON export, but it's not fully compatible with Views 3 (only Views 2).
I posted a feature request to ask for Views 3 support, cfr. #1356658: Make this module fully compatible with Views 3
But it might be better to "just" extend this module with JSON support as this module already integrates Batch API.
Comments
Comment #1
denny84 commentedYes json feature/support in this module makes more sense.
Comment #2
tinflute commented+1 for json
Comment #3
miro.log commented+ 1 for Json
Comment #4
steven jones commentedI'm wondering about spinning JSON support out to a third party module, mainly to ensure that third party modules can implement output formats for VDE.
JSON output might be a little more tricky, but with some leading commas we should be able to do.
Comment #5
steven jones commentedThis is now a standalone module: https://drupal.org/project/views_data_export_json