My customers don't have to worry about this constant headache, because their WP installs are automatically updated via xMarkPro.
Plus they can easily create and manage all their domains and blogs (plus much more) from one central panel.
See sig. Contact me for a 25% discount, and I'll get you setup with an excellent, streamlined solution.
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xMarkPro -- Ultimate Blog Network Management
Streamline your marketing operations. Centralize management of domains, pages, Wordpress blogs, sponsors, link codes, media items, sales and traffic statistics, plus more!