Actually, even with the powerful N73, some of us use the old 3gp format, when converting videos. But mind you, N73 can playback more superior formats like mp4, divx (with 3rd party softwares), real player formats. So it is like playing VCD in your brand new DVD player. (thanks to a forum guy )

Here is a free converter which can convert movies (most of the formats we use) to a highly compressed mp4 AVC format with high quality. The big plus is you don’t need to install any additional codecs for conversion. All needed codecs are built in - So don’t mind the file size. It is 24 MB in size
Download Link : http://www.erightsoft.net/S6Kg1.html (Just scroll to the bottom for getting the download link)

Here is a good discussion about the topic :

http://www.allaboutsymbian.com/forum/showthread.php?t=53910

Popularity: 9% [?]

I tried several sites for n73 themes. Below is some links that I found good.

4 ur mobilephone : Here you can find some really cool themes/wallpapers. But you need to register in their forum before downloading. The registration is free. So just register and you can browse through a lot of good themes.

http://www.4urmobilephone.com/themes/nokia-n73-themes.html

MMCForums: Good collection of themes and softwares. But beware of the softwares. Some of them are pirated/cracked. Use at your own risk.

http://www.mmcforums.net/theme/nokia-N73-themes.html

Update: A new post is added discussing 10 sites for downloading themes.

Popularity: 5% [?]

There are lot of reviews about N73. Before buying read some good reviews…

Here is the complete specification from GSM Arena. http://www.gsmarena.com/nokia_n73-1550.php

Reviews:

• Review on GSM Arena
  
• Review on CNET
• Review on IMobile

Camera compared :

• Nokia N73 vs. Samsung D900 vs. SE K800: Photo samples
• LG KG920 vs. SE K800 vs. Nokia N73: One more photo shootout

Popularity: 5% [?]