I took notice of your book a while back because it was reported to be available DRM free (http://news.slashdot.org/comments.pl?sid=2550422&cid=38209988). I normally only read more "mainstream" stuff, so I'd say that it certainly say that had some small impact. (any word on the non-drm version availability?)

As plenty of others here have mentioned, if you're willing to dive in and maintain it, the tools are available. However, it's probably not going to be worth it to you if you want to avoid the sysadmin side of things. That said, I'd take a look at putting Zarafa (www.zarafa.com) (Groupware, like Zimbra, but native linux code with some cool features like free Exchange Activesync support) on top of a postfix + spamassassin setup to get a really robust set of open-source services going. Add in Maia Mailguard (http://www.maiamailguard.com/) to add automation & central administration to your spam filtering, and you'll likely be pretty happy with your setup (if you're willing to spend the time to put it all together.

Thank you; this was exactly the point that I came to make. TFA is completely FUD, and this is the most glaring issue. It's referencing a blog post where a Mac developer uses this flawed 'Featured Apps' methodology for determining Honeycomb app availability.

(as a side note, I certainly can't fault Google for not promoting an excellent Honeycomb app like Andchat; while I love it, most users couldn't care less about an IRC client).

Honeycomb is *clearly* still very much in early-adopter status, but that doesn't make it ok to just blatantly through around FUD like this.