once all the referral cash starts flowing you can just buy it :)
In the mean time work out a way to ensure as few people as possible have to verbally pass the domain on, think about tools which enable you to let the interested party notify their friends that this is their list; easy things like publishing to facebook, twitter, email, etc.
(some of these may have been done, sorry if they are - I didn't take the time to look it over to thoroughly).
>once all the referral cash starts flowing you can just buy it :)
Looking at the company I think you might have to pay a hefty whack to get that domain.
I'm going to guess that they didn't have anyone there who knew what to do with your request, was it a money offer. I think I'd make a modest money offer (no more than a couple of hundred GBP) - people generally know what to do with an offer of money.
Make it very clear that you want to buy babylist.com name only, that you're not competing directly with them and are based in the US.
I don't think you want a huge offer as this will ring a bell saying "ooh, I better check with someone if I can get more ...".
