Roundup articles are a little like “freebies” for web content writers.  Presumably you’ve been writing in the same niche for a while and have several articles about a few very precise topics.
A roundup article is basically a compilation of all those articles, with links to several of them.
An example of one of my roundup articles [...]

Almost a year ago, I wrote about my Suite101 earnings, because one writer made $5000 in a month and they finally told us we were allowed to discuss our income.
I’m revisiting that topic this year because the industry has changed a little, so have my earnings and my writing habits and Suite101’s best practices
My Suite [...]

On writer’s message boards, occasionally someone new will ask seasoned writers about our process. What steps do we go through in the writing process, to write fast web copy that (hopefully) doesn’t suck?
The process that works for me is so different from what I’m being asked to do in school (did I mention I’m attending [...]

So, much to my surprise, I’m currently registered as a writer at Demand Studios.
Again.
If you don’t know the back story, here’s a link to the drama: OMG I got fired from DS
When Eve originally informed me of their decision, I sent a response, stating my side of the story.  I sent a note of apology to [...]

I use a mini laptop, so I don’t have a lot of screen space. In exchange, I get to take my computer everywhere my busy lifestyle needs me.  I have six kids who are always wanting to go to a friend’s house, to tap dancing classes, jazz, singing, drama, the library, girl scouts, science club, [...]