E50 is the latest addition to Nokia E-Series of business phones. With a very classical - almost unappealing - look, this phone however features a couple of interesting voice features:
Mobile access to PBX solutions to combines the benefits of fixed-line office and mobile phones
High-quality handsfree speakerphone allows conference calls and multitasking (combining voice calls with calendar viewing, SMS, and email)
Quadband GSM works on 5 continents (where GSM networks supported)
Easy speaker activation and mute when call is active
Nokia Office Tools allow more effective communication with work teams:

• Create and edit work-related or personal teams
• Initiate conference calls or Push-to-talk sessions with your team
• Use a team-specific conference number for conference calls
• Send SMS, MMS, and voice messages and emails to your team

I have been able to play with the device for a couple of minutes. It's a real thin and light S60 phone with zero gadget available. From what I have heard, it should be available in two fashions: with or without camera.

The device lacks a little bit of personnality I think but it may might be a very good choice as an upgrade from a feature phone to discover the ease of power of Symbian OS and the S60 platform.

E50 Features at a glance ::

Symbian operating system OS 9.1 and S60 platform, 3rd edition
GSM 850/900/1800/1900 networks in Europe, Africa, Asia-Pacific, North America, and South America where these networks are supported (with automatic switching between bands)
240 x 320 pixels with up to 262,144 colors
Weight: 104g (with Nokia Battery BL-5C)
Dimensions: 113 mm x 43.5 mm x 15.5 mm, 70 cc
Up to 70 MB internal dynamic memory for contacts, text messages, multimedia messages, ringing tones, images, video clips, calendar notes, to-do list, and applications
Support for microSD card
Hot swap slot for easy memory card insertion and removal (card can be inserted and removed when phone is on)

Support for Nokia's Intellisync Wireless Email, BlackBerry Connect, Visto Mobile, Activesync Mail for Exchange, and Altexia
View Microsoft Word, PowerPoint, and Excel attachments (Microsoft Office, 2000, XP and 2003). Compatible with Zip Manager and Adobe Reader
Instant Messaging and Presence Services IMPS 1.2: exchange text messages and multimedia clips practically in real time. Presence allows you to see the status of other users.