Its great to have but dont lose sleep over it - chances are you'll wait a year to be reviewed, then never here whether you were accepted or not anyway. I have a real chip on my shoulder about Dmoz actually. It was a great idea when it started out, now it seems like its lost its way a bit :-(
I think it can be helpful to be listed in DMOZ because many search engines use OPD data such as Google, AOL, Netscape, and Lycos.
My opinion on dmoz is that ANY company that has that poor of customer service/public service/public interaction or whatever you want to call it, should be out of business.