Hi,
If you don't build hardware packs, you can stop reading now.
Recently Linaro Image Tools added support for a new hardware pack format, which offers some new features (http://www.milo.name/2012/07/27/multiple-boards-bootloaders/). With the addition of the V3 format we will shortly be marking V2 as deprecated and finally getting rid of V1 support. There shouldn't be any V1 hardware packs in use, so that shouldn't have any impact on you. The transition to V3 may cause some alarm, but don't worry, there is a converter tool which converts V2 metadata into V3 form and you can them rebuild the hardware pack. We don't have a tool to convert hardware packs once they have been built, but if one is needed it shouldn't be difficult to provide.
Please let me know dropping V1 support is going to cause any problems and any requirements for a V2 to V3 hardware pack converter.