Comparison of Google Talk's Official Clients

Google has way too many separate implementations of Google Talk and very few features are available in all clients:

Features / implementations	Google Talk	Gadget	Labs Edition	Gmail Chat	iGoogle and orkut	iPhone version
Requires installing software	Yes (Windows)	Flash plug-in	Yes (Windows)	No (some features require plug-ins)	No	No
Tabs	No	Yes	Yes	No	No	No
Themes	Yes	No	No	Yes	Yes	No
Gmail notifications	Yes	No	Yes	No	No	No
Calendar notifications	No	No	Yes	No	No	No
Invisible status	No	Yes	Yes	Yes	Yes	Yes
Music track status	Yes	No	No	No	No	No
Text chat	Yes	Yes	Yes	Yes	Yes	Yes
Multi-user chat	No	Yes	Yes	Yes	No	No
Features / implementations	Google Talk	Gadget	Labs Edition	Gmail Chat	iGoogle and orkut	iPhone version
Copy the text of a message	Yes	No	No	Yes	Yes	No
Saving messages to Gmail	Yes	Yes	Yes	Yes	Yes	Yes
Audio chat	Yes	No	No	Yes	No	No
Voicemail	Yes	No	No	No	No	No
Video chat	No	No	No	Yes	No	No
Send SMS	No	No	No	Yes	No	No
AIM integration	No	No	No	Yes	No	No
File transfer	Yes	No	No	No	No	No
View photos (Flickr, Picasa Web)	No	Yes	Yes	No	No	No
Play videos (YouTube, Google Video)	No	Yes	Yes	Yes	No	No

You can also use any other client that supports Jabber, but most of the features above won't be available.