The new BlackBerry 8820 is the first RIM device to offer Wi-Fi connectivity. The concern seems to not be directly linked to RIMs implementation of Wi-FI, just the fact that it is available and end users will use it to surf the web or do business on unsecured Wi-Fi links. Computerworld has a nice summary...
If you need to give a service account access to all mailboxes on a specific Exchange 2007 server you can run the following command: Get-mailboxserver <servername> | add-adpermission –user <service account> -accessrights GenericRead, GenericWrite -extendedrights Send-As, Receive-As, ms-Exch...