In reply to cymjt:
I don't think such a feature exists, and I think it is unlikely to exist in the near future.
The basic problem is that the names you have given crags and routes in your excel file are going to be a little (or in some cases a lot) different to the names in the UKC database, thus any bulk upload of climbs will require a long and tedious mapping exercise.
It would probably be possible for the UKC team to build some tools to ease the pain inherent in this process, but given that it would most likely be quite a lot of work for a feature that won't get used very often and will never be a very good piece of functionality Id be surprised if they're planning on investing any time in it.