Putting a standard drupal form inside a block

One thing that I would like to do with my site is create a shout box, where anyone can just post something real quick in a block and it shows up right away. I looked at the shoutbox module, but I didn't like the way it worked, and I wanted more control. So here is my plan:

1. Use CCK to set up a small content type (with fields shout, name, and maybe one more).
2. Have a view in a block on the side that shows the most recent shouts in 'most recent' order.
3. Have a small block above #2 where people can quickly fill in the 2 or 3 fields and create a new shout.

I can do the first two, but number 3 is where I have problems. Is it possible to put a content creation form inside of a block? I do know PHP, so I could do some coding, but I would rather not create an entire new module.

Also, is there a way to refresh just the block in #2 every x seconds?

Thanks in advance.