Another thread raised the question of "logging off" of gMail on the Droid as a way to secure access to one's email. Frankly, I hadn't considered the problem but the more I thought about it, the fact that you apparently cannot protect any email account from access once the phone is open appears to be a serious problem.
Unfortunately, the earlier thread focused on the question of how an email account could be synched if a phone "logged off" of the account. That isn't the issue. It's perfectly acceptable to have your phone "logged into" your gmail (or corporate email) account for synch purposes. What is simply not acceptable to many people is the fact that the default "gmail" and "email" buttons cannot be password protected on the phone. At least as far as I can tell.
And yes, I realize one can lock one's phone. And one can refuse to allow anyone to look at your phone unsupervised when it's unlocked. But it's utterly insane to market a smart phone for business use where email cannot be password protected. (I'll leave aside the question of personal preferences about the privacy of one's email and why one might not want a friend to have complete access to your email.)
So the question is, have I missed an application in the market that can interpose a password between the gmail or email buttons and access to email? Is it possible to develop such an app? I'm suspecting it isn't since the gmail and email apps appear to be "built in" to the Droid and cannot be messed with without (at least) rooting the phone.
I'm sure if there is anyone out there who reads my posts here, they're tired of hearing me complain about the weaknesses of the Droid as a business phone. But this is perhaps the prime example of the challenges faced in making it a suitable choice for corporate use.