I have to say I'm quite disappointed to find that after filling out the initial battery replacement form, to now find that I am not eligible due to the date I purchased my Iliad (March 28th 2007).
This even though when I filled out the form there was no mention of date limits on free replacement, see the linked image taken from archive.org showing that as late as Jul 11, 2007 the form made no mention of date ranges and noted that it was a free battery replacement offer:
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Imagine my elation after reading I could elect to purchase the updated back panel, then my deflation to find that iRex have now decided that I'm not eligible for free battery replacement, even though I filled out the form well before there was any mention of date limits to the eligibility.
I find this very disenchanting, and would now find it quite difficult to recommend friends to buy and deal with iRex in the future given this turn of events.