As Rick is hinting at, iView can do this really easily, without all those messy actions (insert '60's commercial fadeout here).
If you are not using iView, or other DAM application that can do this for you (at nearly 10 times the speed of doing it in Photoshop), then at least treat yourself to Dr. Brown's 1-2-3 Process. Takes all the fuss and muss out of batching out JPEGs, TIFFs and PSDs!http://russellbrown.com/tips_tech.html
But wait! There's More!
You'll also get CaptionMaker, Merge-a-matic, and several more indispensable tools!
Act today! Order before Midnight tonight! All for the low, low price of.....