Have we been HACKED/ATTACKED by aweber or what?

Hi all?
Please enlighten ASAP if you can. Thank you in advance.

I was just to update the site of a friend of mine and going through the database before the back up I found a very long entry with this (screenshot) inside the wp_options table.

O:9:"MagpieRSS":19:{s:6:"parser";i:0;s:12:"current_item";a:0:{}s:5:"items";a:10:{i:0;a:13:{s:5:"title";s:75:"Enabling. Facilitating. Encouraging: Website In A Weekend March 25-27, 2011";s:4:"link";s:92:"http://website-in-a-weekend.net/getting-started/enabling-facilitating-encouraging-wordpress/";s:8:"comments";s:101:"http://website-in-a-weekend.net/getting-started/enabling-facilitating-encouraging-wordpress/#comments";s:7:"pubdate";s:31:"Wed, 16 Mar 2011 08:08:46 +0000";s:2:"dc";a:1:{s:7:"creator";s:11:"Dave Doolin";}s:8:"category";s:15:"Getting Started";s:4:"guid";s:40:"http://website-in-a-weekend.net/?p=24245";s:11:"description";s:613:"(Reading time: 3 – 5 minutes) It’s a rainy Sunday afternoon as I write here at Dos Palmas, Website In A Weekend’s headquarters. The weather warmed up a bit last few days, enough to get out and root around on the stairscape. Urban living precludes the Big Yard (“garden” for those across the pond), so [...]<p>Post from: <a href="http://website-in-a-weekend.net">Website In A Weekend</a><br/><br/><a href="http://website-in-a-weekend.net/getting-started/enabling-facilitating-encouraging-wordpress/">Enabling. Facilitating. Encouraging: Website In A Weekend March 25-27, 2011</a></p>
";s:7:"content";a:1:{s:7:"encoded";s:8520:"<p></p><p class="estread">(Reading time: 3 – 5 minutes)</p>
<div class="tweetmeme_button" style="float: left; margin-right: 10px;">
			<a href="http://api.tweetmeme.com/share?url=http%3A%2F%2Fwebsite-in-a-weekend.net%2Fgetting-started%2Fenabling-facilitating-encouraging-wordpress%2F"><br />
				<img src="http://api.tweetmeme.com/imagebutton.gif?url=http%3A%2F%2Fwebsite-in-a-weekend.net%2Fgetting-started%2Fenabling-facilitating-encouraging-wordpress%2F&source=websiteweekend&style=normal&service=bit.ly&b=2" height="61" width="50" /><br />
			</a>
		</div>

And this goes on and on and on….

The blog is a FAMILY ONLY one with just 3 members and 5 subscribers, having no more than 30 comments and 70 posts dealing with recipes, and ecology. Furthermore NONE of them ever even heard the words aweber, website-in-a-weekend.net or the likes mentioned in the table.
I could only find the magpie file inside their outdated feedwordpress plugin folder.
Is there some kind of a hack?

Thanx again.