Google Apps – where's my abuse@

Most ISP feedback loops require you to demonstrate that you’re really responsible for your domain before they’ll start forwarding reports to you. The usual way that works is pretty similar to a closed-loop opt-in signup for a mailing list – the ISP sends an email with a link in it to the abuse@ and postmaster@ aliases for your domain, and you need to click the link in one or both of the emails to continue with the feedback loop signup process.
That’s mostly there to protect you, by making sure that someone else can’t get feedback loop messages for your domain. And it’s not too difficult to do, as you should already have an abuse@ and postmaster@ alias set up, and have someone reading the abuse@ alias.
But maybe you’re using Google Apps to host your corporate email, and that’s the domain you need to use for your feedback loops. So you go to create abuse and postmaster users, but it won’t let you – you just get the error Username is reserved for email list only. Uhm, what?
Google want to police use of domains hosted on their service, so they automatically set up abuse and postmaster aliases for your domain, and any mail sent to them is handled by Google support staff. You may well be happy with Google snooping on your abuse role account, but you really need to be able to read the mail sent to it yourself too.
So what to do? Well, the way Google set things up they actually create invisible mailing lists for the two role accounts, and subscribe Google Support to the lists. In older versions of Google Apps you could make those mailing lists visible through the user interface by trying to create a new mailing list with the same name, then simply add yourself to the mailing list and be able to read your abuse@ email.
But Google broke that functionality in the latest version of the Google Apps control panel, when they renamed email lists to “groups”. If you try and create a new group with the email address abuse@ your domain you’ll get the error Email already exists in this domain, and no way to make that list visible.
So, what to do?
Well, there’s a workaround for now. If you go to Domain Settings you can select the “Current Version” of the control panel, rather than the “Next Generation” version. That gives you the old version of the control panel, where all this worked. Then you can go to User Accounts, create a new email list delivering to abuse@ and add one of your users to the mailing list. You can then set the control panel back to “Next Generation” and have access to the mailing lists via Service Settings → Email → Email Addresses.
Hopefully Google will fix this bug, but until they do here’s the step-by-step workaround:

1. Go to Domain Settings, select the Current Version of the control panel and hit Save Changes
2. Go to User Accounts and click Create email list
3. Enter “abuse” as the name of the list, and one of your users as the recipient, and press Add recipient
4. Do the same thing again to create your postmaster list
5. Go to Domain Settings, select the Next Generation of the control panel and hit Save Changes
6. Go to Service Settings → Email → Email Addresses and you’ll see the two mailing lists, and you’ll be able to add and remove recipients from those lists

And then you should have working abuse@ and postmaster@ aliases. Before you need to rely on them, test them by sending mail to them from somewhere other than your Google account.