refer to this post: "ISP Blocking Gnutella? I can get around it..... ", there are a few people that have been having this problem also.
The problem (for me definitely) is not busy routers. I got juno on my machine for the hell of it and connect within 1 minute. As soon as I try to connect with my work T1 line (same PC that is) I get timeout messages and no further attempts to connect to anyone else.
No one seems to know how to get around this one...