I have so far been using Skype to do conference calls on Ubuntu Maverick. I want to stop using Skype because the client looks pretty bad (or has a number of minor bugs) in the default Ubuntu theme (e.g. menu items don't display unless you point at them), and it seems to use up a lot of my CPU while audio calling.
Are there any audio conferencing (i.e. 2-10 people in a call simultaneously) tools that are FOSS and work quite well in Ubuntu?
Some additional requirements:
1) I want to have minimal setup and use open protocols if possible.
2) I need a s/w feature to record the call (I'm planning to make podcasts).
3) Cross platform - The people I call may be on a difference OS, so a suitable client should be available for their system too (Win/Mac).