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Welcome to wmw. I would not submit these URL's to the search engines if they just do a redirect or a meta refresh. However, you might want to consider putting some good content on them and submitting if the domain names are That Good. In addition you might want to have content on these domains and link to the main site for some link pop.
If these domain names happen to be in any directories (yahoo, AOL, ODP etc.) then I would definitely put some content on these newly purchased domains.