BEEM means "Boost your Eyes, Ears and Mouth"
Yes. You can find us at beem@conference.elyzion.net. You can also find us on the IRC at the channel #beem on freenode network.
The Gtalk server use a non standard authentication scheme : they don't use the user part of the jid to authenticate but instead they use the full jid.
If the domain part of your JID is not gmail.com or googlemail.com you have to enter in BEEM a jid in this form : user@example.com@example.com