uh oh. here somes another crackberry addict...
with the blackberry internet service, commonly referred to here on the forum as BIS, will allow you to sync up to 10 personal email addresses to your handheld device. the only requirement here is that you can access your email through a POP email account- a technical term basically amounting to the fact that you can access your email account with any basic email application like Outlook Express or Apple Mail and the like. check out BlackBerry's website for more information on the features and limitations of the service.
you can sign up for an unlimited BlackBerry data vodafone plan to access the web and receive unlimited email messages. be aware that the BlackBerry browser is painfully slow. and if your an information addict too, I suggest you download a news reader program for the BlackBerry that will automatically download all the news articles you can think of to your BlackBerry device so you don't have to deal with the BlackBerry's slow browser that much. the best resource to determine which plan is right for you would be available at Vodafone Home Page
under the BlackBerry menu.