Free Web Conferencing

I am looking out for a free web conferencing service that I can use for some technology webcasts/webinars for the community. The options that I want are:

1. Do a presentation using PowerPoint
2. Share applications or the desktop to show demos
3. Audio over the Internet
4. Video via a Webcam support (something that is not a must, but I kind of would like it)
5. Recording of the whole conference for later feedback either as WMV or other video formats
6. Unlimited attendees (or atleast a large number of attendees).

I am even fine if there is a low monthly fee, but most of the services either seem to restrict the number of attendees in the free or low cost form and need an enterprise license for the higher attendee support. The reason I want a high attendee count is because this is aimed at the community, it makes little sense if it is restricted to 5 attendees etc. Though I understand unrestricted attendees maybe too much to ask for, I would be OK with 500+ attendee support.

Skypecasts seem to be right for this, but then I found that Skype has pulled the plug on that one.

I kind of like Livemeeting, which is around USD 15 per presenter (in the professional version), but allows up to 1250 attendees per meeting. But you need to buy at least 5 user license. No single user license.

Any ideas anyone? If you/your company do run a webinar service and would like to offer Ad supported service I am OK with that too. Leave a comment, use the contact me link in the blog.