As an experience, it was a good one. I was able to write a piece, directed at an audience that was wider than the ecological community, work on being concise and learn a little more about an issue not only within my own field but one that is prevalent in others too. I have also learnt not to worry too much about what other people will think, that shouldn't be a barrier to learning. Researching a topic and writing about it is a great way to learn and knowing that you or someone else will post the finished product forces you to get it done.
So, don't let the nerves get the better of you! I would encourage anyone to try and write a short piece on something they feel they know little about, you soon realise you know more than you think and it encourages you to research the area so as not to say something completely wrong! If you aren't going to post it somewhere yourself, find somewhere else to put it; perhaps your department has a blog. You never know who could read it and what other opportunities could arise from that small piece of work.
If you are interested in seeing my post, it can be found on the DNA Digest website here.