I'm pleased to say that the reseller API now allows multiple accommodation categories to be queried. Instead of passing a single PIMCode parameter you can now pass a comma separated list of PIMCode parameters.

E.g. "HOT,MOT,BAB" - this would return all hotels, motels and bed and breakfasts.

If you pass nothing to the API it will return all types. The full list of PIMCodes are as follows:

Hotels HOT
Motels MOT
Bed and Breakfasts BAB
Backpackers BAK
Apartments APT
Lodges LOD
Holiday Parks PRK
Holiday Houses HSD