Advice on custom app with blogging interface

I am developing a custom app for a local company that needs to handle a
lot
of customer specific actions. However, they also want a blog that is
somewhat tightly integrated into the app, for instance when a customer
logs
in, he will see items he can take action on, but also can see some of
the
“news” from the blog.
This blog should also support RSS and atom feeds.

My question is this:
Should I try to piggyback on one of the current rails CMS systems,
(i.e.
Radiant, Mephisto, etc) or just build my own? I read a post recently
about
how RSS is very easy to do in edge rails, which is what I will be
targeting
since by the time the app is released rails 1.2 will definitely be
available. Also, the Radiant source code is available under the MIT
license, so I would be pretty much free to borrow whatever I needed from
it. I guess my main concern boils down to whether or not developing a
small
custom blog would be too time-consuming, and also if by not using a
mainstream CMS I miss out on easy updates/security fixes when they
release
new versions.

Any thoughts on the issue would be appreciated.
Thanks,
Tyler P.

Tyler P. wrote:

I am developing a custom app for a local company that needs to handle a
lot
of customer specific actions. However, they also want a blog that is
somewhat tightly integrated into the app, for instance when a customer
logs
in, he will see items he can take action on, but also can see some of
the
“news” from the blog.
This blog should also support RSS and atom feeds.

A blog is not a complex piece of software, even with RSS feeds. When in
doubt, rool your own, it will always be more flexible and more of
exactly what you need.