Dublin Dr Pepper
Another HFCS-Free soda is Dr Pepper bottled in Dublin, Texas, made with Imperial sugar. It's much less cloying, with a little bit sharper taste. The difference is subtle, but it makes a nice treat. Also, the bottles are smaller than the regular sizes, which is good for those of us who like a treat but don't need 12-20 oz of treat.
We find it at our local Central Market (HEB's specialty stores, located in Dallas, Houston and Austin).
A number of small bottlers are coming out with some really delicious alternatives to HFCS-loaded, name-brand sodas. I recently had an IZZE soda (blackberry flavor) that was terriffic. The ingredients listed were carbonated water, several juices, including apple, grape and black raspberry, and a couple of other things. That's it. There's also Jones sodas, Nantucket Nectars, etc. Whole Foods carries a bunch of choices, including a store brand.