With the proliferation of hot new smartphones such as the iPhone 3GS and Palm Pre comes a dilemma for enterprise IT: employees are insisting on using their favorite mobile devices for business, even if their companies don't support those devices and can't secure them.

And yet, most IT staff want to accommodate their fellow employees -- not to mention the executives who want these devices.

That's the key finding in a report out today by Vanson Bourne, a technology market research firm, which surveyed IT decision makers of 300 companies in the U.S. and Europe about issues related to using devices such as the iPhone, Palm Pre and Android on corporate networks.

The report, "The Device Dilemma," which was commissioned by the mobile management firm Good Technology, reveals that the demand for support for new types of mobile devices in the enterprise is on the rise.

Nearly 80 percent of companies reported an increase in the number of employees wanting to use their own devices in the workplace in the last six to 12 months, says the report. These smartphones include the iPhone, Palm Pre and devices based on Android, Windows Mobile and Symbian mobile operating systems.

Apple's (NASDAQ: AAPL) iPhone has the most fans, with 82 percent of respondents in the U.S. and U.K. getting requests for iPhone support.

The report comes at a time when Apple, while not courting the enterprise per se, is nibbling away at corporate market share as it rolls out modest improvements in security features with updates to the iPhone OS.

Get the full story here at InternetNews.com.