Why is the HTC Legend Froyo ROM labelled as being for Vodafone? I am currently using Optus and would like to upgrade to this ROM, but it is labelled as being a Vodafone ROM. Is this important? Is the ROM locked to the network or are there other issues it may cause if I installed it. Would this be any different from buying a phone from Vodafone then switching networks?
I've done sort of the reverse -- installed a US T-Mobile ROM to my T-Mobile phone while I had it on the Canadian Rogers network.  Since the Legend is also a GSM phone like my Vibrant, I would expect yours to work just as well as mine did.  Just make sure you have your SIM card in for the whole process.