I'm not really sure if it can be created in photoshop. I've never heard if it can or can't, but I do know most people find something else to edit IPTC tags. I personally use Picasa.
The top 6 micro-stock agencies, as rated by profits, are in this order (which changes):
- Shutterstock
- Istockphoto
- Dreamstime
- StockXpert
- Fotolia
- 123RoyaltyFree
The second-tier sites are:
- BigStockPhoto
- Crestock
- FeaturePics
My personal favorite is BSP, but they all have their own 'personalities'.