I use FriendFeed. Pros: Great email integration, real-time conversation, sweet UI designed by ex-googlers, powerful search capability. Cons: Search doesn't al

I use FriendFeed. Pros: Great email integration, real-time conversation, sweet UI designed by ex-googlers, powerful search capability. Cons: Search doesn't always work. Although Facebook keeps the service running, it isn't as high-priority as their bigger product.