You may want to share a bit more on what exactly your work email is set up as since Outlook can be set up to monitor different types of mailboxes. In particular, does your work use MS Exchange? If so, does your work provide OWA (Outlook Web Access)? Does it expose POP3 and/or IMAP as options for remote connectivity? Also, do you need/want push mails (i.e. instant notification of incoming emails)? Do you also need to sync up PIM data in real-time?
There are a few options as you already stated that there are Sprint Connection (for Sprint) and VersaMail. Third-party apps such as ChatterEmail are also available. I'm sure you'll hear a lot of opinions after you post more details of your work email setup.
