WordPress-to-Lead for Salesforce CRM creates a solid integration between your WordPress install(s) and your Salesforce.com account!
SF's answers I see in the support forum are 'add a jquery form validation plugin from Germany...'. Sorry, having to rely on client-side validation from another 3rd party is NOT a very good security strategy (or marketing strategy) IMHO. If you really expect everyone to move their precious data to the SF 'cloud, why can't you include simple server-side field validation in this plugin (and maybe a decent phone number field)? 'Not rocket-science.
PLEASE prove me wrong and fix this gaping hole and I'll gladly re-visit my rating.