If like me you use Freeparking to hold your domain, and then just blind redirect all traffic to somewhere you don't own, like Blogger, you'll have trouble if you try to use Google Apps. To verify that you own your domain, Google insist you either add a custom CNAME record or upload a file. The former would be fine but for Freeparking's underpowered DNS Manager. Don't even try to make it work - it won't accept google.com as a CNAME, Freeparking's FAQ suggestion of www.google.com gets accepted but is ignored by Google, as is IP address. Nothing works. Not even contacting their CS and asking them to change it manually.
So, the thing to do is to experience a temporary outage of service (I'm sure my readers can live with it) and redirect www.yourdomain.com via the muppet domain control panel to members.Lycos.co.uk/yourlogin, where in a matter of a minute you can sign up for a free account which will quite happily host the temporary html file that will make Google smile upon you once again.