I've always been a fan of the high quality articles available in the Architect Journal.
Of course you've always been able to subscribe or view articles online but now there is a better way to read, search and share articles. Simon Guest and co. have just released a beta version of the Architect Journal reader.
It's based on Windows Presentation Foundation (WPF) and automatcally syncs up new content from the web site. Great for offline viewing too. I likey!