If you want to come over as a little more professional / serious about your writing, particularly when submitting work to traditional print publishers, as well as online to places like Amazon, Barnes and Noble, Smashwords etc, you may wish to consider using a pen name.
Using your lush member name, will mean nothing to anyone outside of lushstories.com!
If you are writing purely for some light hearted fun, then please ignore this post!
Alan wrote a useful piece over on our sister site about the subject: http://www.storiesspace.com/forum/yaf_postst373_Pen-Namespicking-using-protecting-etc.aspx
Here are a few links that might help too:
http://www.jh-author.com/pename.htm
http://carinapress.com/blog/2010/08/things-to-consider-when-choosing-a-pen-name/ (a lighter hearted look at the subject)