Research in Motion turned an army of executives at big enterprises into mobile e-mail addicts with its BlackBerry handhelds. Now it wants to do the same thing for users in much smaller companies.

RIM has announced a revamped and re-priced version of its BlackBerry server software for small to midsize companies. The new version supports double the users of the previous release and costs about half as much. RIM engineers simplified the setup process for these customers, which usually lack dedicated IT staff, by devising a set of ready-to-use templates and wizards.

The new BlackBerry Professional software will replace the company’s previous offering for this market, the BlackBerry Enterprise Server SMB Edition. For existing customers of the SMB Edition, RIM is offering a free upgrade.

RIM hopes to exploit both its brand name recognition and what it says is strong demand in the SMB market for secure, affordable wireless e-mail, a demand frustrated by a lack of well-known offerings. Microsoft has its own push-e-mail offering as part of Exchange server for Microsoft-based handhelds, but doesn’t have a dedicated SMB product. That’s just one factor that drives ongoing speculation that Microsoft might be interested in buying RIM. Motorola earlier this year finalized its purchase of mobile e-mail vendor Good Technology, which is now, with the Symbol Technologies acquisition, a key part of Motorola’s Enterprise Mobility Solutions division.

Internal research by RIM found that 78% of SMB users are interested in using wireless e-mail, says Alan Panezic, vice president of software product development for RIM. The study identified four key criteria: a $500 to $1,000 price range; extremely easy deployment and operation; deployable on an existing mail server such as Microsoft Exchange Server or Microsoft Small Business Server; and rock-solid security. BlackBerry Professional is designed to meet each of them, Panezic says.

RIM has been expanding an array of options for SMB users. The BlackBerry Internet Server is a hosted solution that makes use of popular IMAP and POP3 Web e-mail services from AOL, Yahoo, MSN, Google and others. Supporting up to 10 e-mail accounts, it’s aimed at individuals and small offices. The BlackBerry Unite! Software supports up to five Web e-mail accounts. It’s a free software download and includes functions such as calendar/scheduling, file sharing and remote file access.