I am strangely compelled by the business model of Radio Shack's iGo product line.
Sell relatively cheap AC/DC adapters. Then sell item-specific tips at $10/each. A very elegant and very pricy solution to the collection of wall worts in my briefcase.
A01 (wife's old and new cellphones, car MP3 player).
I am getting
A29 (new Blackberry)
B01 (iPod mini)
My only wish is that they had non-product specific listings. I have some portable speakers from the 90s that would be worth buying a tip for.