I use Earthink, and they seem to be having a conflict with Yahoo - I can't recieve any mail from people with a Yahoo email account. I thought it was because I was on the road, but I'm still having the same problem at home. Earthlink assures me that their "engineers are working on it."
So, if you Yahoo and have emailed me in the past month and a half, I'm not ignoring you. I haven't got your mails. If it's important, drop a line here.