Today I registered and tried out LotusLive: apps.lotuslive.com.
LotusLive is a web browser based global conference tool, which works very similar to a SameTime conference.
The benefit over SameTime is that you don't have to install any software (only browser plugins), and that the meeting is available on the internel, globally.
The people who are invited to a meeting can use Firefox or IE, but the host needs both browsers to create a meeting.
The meeting must be created with IE8, and then the invitation must be sent with Firefox using a different LotusLive account, since the sending of an invitation doesn't work in IE8.
Alternatively, Firefox can be skipped, if the invitation is sent via normal mail (there's a link for that on the main page of the meeting hosting).
I tested to share single application, and also to give control to a colleague, and it worked fine.
It was a bit slow, using Notepad++ as shared application, or a OpenGL 3D engine application, but it worked.
If the bandwidth could be improved, it could really replace coorporate SameTime conferences, and adding the feature that also external vendors and customers can be invited to the meeting.
I read in the news that Obama is putting 800 billion dollar to raise the bandwidth in USA, so this will be positive for LotusLive also.