The N8 comes with Nokia's Mail for Exchange software built in, providing push-based bi-directional synchronisation of mail, contacts, calendar and notes information with Microsoft Exchange 2003 SP2 or later.
The N8 also supports multiple concurrent Exchange email accounts.

Nokia have released an update to their Social Messaging client for the Symbian S60 platform in the Beta Labs web site. This update brings support for Twitter as well as Facebook.

Nokia have published an updated Mail for Exchange client to the OVI Store, freely available for download on compatible handsets.
To check whether your device is supported, view the Ovi web site - http://store.ovi.com/content/5919

The updated client can be downloaded quickly and easily by searching for Mail for Exchange in the device's built-in Ovi Store client application:

To hard reset a Nokia Symbian Series 60 handset, erasing ALL USER DATA and restoring the device to a factory default state, do the following:

• Put the phone into the Offline profile
• On the keypad, enter *#7370#
• When prompted for a lock code, enter 12345

The phone will now be reset.

The N97 has the Nokia Mail For Exchange client built in, so there is no need to download it from the Nokia web site (indeed at the time of writing the N97 is not listed because of this).

The client is the same as that used by the E71, providing the ability to synchronise your Inbox, Contacts, Calendar and Tasks folders as well as setting your out of office status.

The Nokia Configuration Tool is a free application available on the Nokia Business Software web site: http://www.businesssoftware.nokia.com/nokia_configuration_tool_downloads...

The tool, which requires that the Nokia PC Suite application be installed beforehand, allows the administrator to create XML-based template files defining such settings as:

• Internet Access Points (GPRS/3G, WLAN including proxy settings and wireless encryption details)
  

GMail for Mobile is currently at version 2.0 - you can read the release notes on the Google Mobile Blog here:

http://googlemobile.blogspot.com/2008/10/introducing-gmail-for-mobile-20...

This version provides support for accessing multiple GMail accounts simultaneously as well as saving multiple drafts to the mobile device. Messages can be composed and sent, even in areas where there is no mobile signal; the messages being sent automatically when signal is restored.

Microsoft have released a version of the Office Communicator Mobile client software for Java-based handsets.

The client can be downloaded from here:

http://www.microsoft.com/downloads/details.aspx?familyid=1FEEAB9B-02FC-4...
(for Nokia S60 240X320 resolution)

or from:

http://www.microsoft.com/downloads/details.aspx?familyid=DCB3AE06-ED5F-4...
(for Nokia S60 320x240 resolution)

Or alternatively by browsing to http://www.getcomo.com in the device browser.

The popular PuTTy application for Windows, which allows administrators to connect to Unix or Linux hosts at the command line, has been ported to the Symbian Series 60 platform.

It is available for download from the SourceForge web site here: http://s2putty.sourceforge.net/download.html

It did not require any additional pre-requisite components to run on my Nokia E71. Simply copy the SIS file to the handset and run it, once installed it will be listed in the Installations folder: