A friend was looking at this and came away worse for wear. Why? Because there are dozens of standards so which ones did he need to support?
Example at http://en.wikipedia.org/wiki/Barcode#Linear_barcodes
So for now you can generate a barcode with what you have for what standard you want and then copy/paste it for now.
I am looking for a 2D datamatrix barcode generator as a plug-in for illustrator CS6.
I like esko, but 450 is a bit salty.
Are there are others out there?