Im currently testing Beta msn and live beta mail and i havent experienced any problems, you should email microsoft hotmail customer service. I said yes and got a acceptance email straight away check ur junk emails.
I'm Beta testing 'Windows Live Messenger' and have just got to accept the offer to join 'Windows Live Beta Mail' and have not experiences connection problems with WLM. So once you sign up for WLBM you can't access your email through hotmail anymore?
I have MSN messenger and Beta Live Mail. I could access my mail for the first day but since then I have had connection problems. I'll see what customer support tells me.
Just use the IE plugin if you're using firefox. The only problem is that it automatically opens the top email in your inbox regardless of what it may contain...