I accidentally erased a bunch of pics from my SD card in my Canon SD400, using the camera, and then I took 9 more pics.

Can I recover the pics?

How? :(

1) Don't use it in the camera until you've finished recovering.
2) Don't panic !

You might have lost 9 of the original pics, or if you're lucky they'll all be on the card.

I use Image Recall available for Windows or Mac.
http://www.imagerecall.com/

Use a USB card reader to make the card appear as a drive on your computer unless you're lucky enough to have one built-in.

That image recall software should help that Paul posted. I agree that you may have lost 9 images, but chances are you didn't unless your card was completely full when you deleted the images. Good luck!

You may have seen it by now, but check the thread at the top of this forum - lots of advice there.

You can try for recovery image this program
http://www.oemailrecovery.com/photo_recovery.html