As far as I can tell by searching MarksFriggin.com,
Liddy hasn't actually been
on the Stern Show since the late 90s. One of his "Stacked and Packed" models was on 1999. Stern show friends sent prank calls they made calling Liddy to Howard in 2005. But Howard mentioned that Liddy has a new book (1/23/06), so this might turn out to be be a book promo. Liddy was dropped from my area 1/2005 and I have trouble streaming him. I miss Liddy.