Hi Sumner7,
I have a Nokia old ONDigital box and it has a slot (infact it is same as one shown in topup preview). Were the ones you have without slots bought as specifically freeview boxes as opposed to being old on/itv digital ones. I thought all the ondigital boxes needed cards to work. Maybe it is new boxes like KennyR's that don't have them? I had heard that SkyOne would be in the topup line-up but it seems not. Apparently, might be added later. Hope so, that would make a big difference to whether I get it or not. And KennyR is right - digital TV is pretty damn good.