Slocket to me!
The three converters being tested are the Abit RS370 "Slotket", the MSI MS6905, and the Gigabyte GA-6R7. Although similar in appearance, upon close inspection it's clear that all three are original designs. On the front face of each converter is a standard PGA370 ZIF socket, which provides the connection for a Celeron PPGA and heatsink/fan. Other than a few ICs and capacitors, there's not much else of interest on either board. Simply plug in the Socket-370 CPU and throw down the locking lever. Then attach a standard Socket-370 heatsink, and plug the entire assembly into your Slot-1 motherboard.
The Abit AB-RS370
The RS-370 "SlotKET" is the largest converter card, both slightly wider and taller than a standard SEPP package, weighing in at 8.7cm x 13.9cm. We had concerns about the large size fitting in smaller ATX case designs (especially the ones which have a power supply fan situated on top of the processor slot), but there was plenty of room to spare in each case we tested.
The MSI 6905
The MSI card is the most compact, measuring 6.7cm x 12.7. It closely resembles the rectangular form factor of a standard Celeron SEPP package, which measures 12.8cm x 5.8cm. The 6905 is the only converter in the group that uses cylindrical capacitors. However, It's also the smallest and most likely to fit in any given case.
The Gigabyte GA-6R7
Though not well-known in the US, Gigabyte is a major player in the motherboard industry in Taiwan and Europe. The 6R7 even comes with a BIOS update disk for many of Gigabyte's Slot-1 motherboards. Note that the update disk is update systems which do not support Celerons in general. There are no modifications needed in a system which can already accept Celeron processors.