Most directories I know will accept your link regardless of its low PR, as long as your site meets their quality guidelines.
Submissions are accecpted by 'quality directory' owners on the basis of submission quality and not pagerank. Pagerank has got nothing to do with a submission.
There are a handful of free directories that have a guideline in place stating that your site must have a PR2, but this is not very common from what ive found. As mentioned already, its not really a concern when submitting.
Directories that require a link back may ask you to provide a non pr0 linkback.. Paid directories will not look at your page rank
If a directory declines your site because of the pr then they've done you a favour, a decent directory will not use this as a criteria.
Your PR has nothing to do with being approve or not. I think most directory owners are lazy about approving free listing, but if you folk out a couple of bucks. You will get list.
There are some new directories editors who wouldn't accept your website if it's PR 0, but most seasoned editors won't bother about your website PR.
As jitendraag noted, your submission will be reviewed based on quality and not PR. If PR was our gauge for all listings, then many useful and unique websites would not be listed.
hay sure, you can submit your site in free web directory if you have 0 PR. it's not a concern of your site PR.
To submit in a directory does not need page rank, but there may need the quality of sites, the quality of submission and should be meet the requirement.
Don't worry about page rank, according to me page rank only for people who trading links, page rank is not impact significant to traffic. That you need is content, create a good content that people need it, and then they will link to you. Your page rank will be added.