Next time you go to a conference or networking event, bring Chimpadeedoo. A kiosk-style app tied to the popular MailChimp e-mail marketing service, it allows you to gather e-mail addresses via an elegant interface on your iPad. You can customize the background and the text, and you can turn the iPad into a sign-up stand thanks to the screen-lock feature. The collected e-mail addresses transfer wirelessly to your MailChimp account, where you can manage your newsletter or marketing campaigns. The developers are looking into adding other data fields, as well.