Do you ever get frustrated waiting for replies from publishers on the manuscripts you've submitted? The question is whether to submit your manuscript exclusively to one publisher or submit simultaneous submissions. And how long should one wait before querying on the submission? There have been times when I've gotten a reply (rejection) a year after the original simultaneous submission.
Not sure which way to go? There is an excellent article on the following Website: http://www.underdown.org/multiple.htm arguing the pros and cons from the writer's and the editor's viewpoints. Be sure to read the article and then decide which route you want to take. Best of luck with your submissions.