The Switch Campaign
There's a great article on mozilla.org entitled Reasons to switch to Mozilla Firebird. All the graphics and icons are really well done.
I'd love to send it to people I'd like to convert to Mozilla. But when they ask where to download it, I'd have to say something like "Oh, you can get Phoenix 0.5 for now, but there's been a lot of changes since then so maybe you should download the Mar 20th nightly build instead." But then I'd probably be asked "Why am I downloading Phoenix when this says Firebird?" or "What's a nightly build?"
So really, it's easier just to wait for Mozilla Firebird 0.6 and send the article then.