Check out Poochella's posting.

http://forums.gardenweb.com/forums/load/dahlia/msg1003111025242.html?30

Here is a link that might be useful: Poochella's posting about eyes.

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I thought I added this yesterday, but must have forgotten to add it.

Woodygardener, I took the liberty of saving your photo and marking it up too. I agree wholeheartedly with Jroot on his markings. Most people don't save the 'old (mother) tubers' from the past season, unless desperate to save the variety.

I think I see a couple obvious eyes: the largest on tuber 1, and the darkest point on the photo above it on the stem, which has no tuber yet, but, if left to grow, would likely spawn one. Doesn't do you any good now, but if it had a tuber with an eye, it would be salvagable and they grow just like other tubers, the next year. I'll post a shot of stem tubers below, but here is what I can see from the photo posted. Some really close up shots of questionable eyes/tubers would be easier to see or at least fathom a guess. If in doubt, save the clump whole after trimming, or hack it into approximate halves or quarters and remove 'junk' before storing. Then mother nature will help you divide in spring.

Your clump:
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Green lines are where I'd cut/trim.
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an example of stem tubers seen 1-2-3 high up above the main clump/tubers below. Bet you can see obvious eyes on tuber number 4, right of the stem tubers.
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Many thanks to you both jroot & poochella. Your picture markups are greatly appreciated!! We will do our best to follow you tips.