I recently set up as a reseller. I created a total of 5 accounts so far in WHM. This morning I'm able to see only 2 of the sites online. The other 3 are just blank screens! Further, I can't seem to be able to get the email on any of them to work today.

I'm really pulling my hair out. One of the sites in particular is my biggest site with the most traffic, ,and it's been down for 4 hours.

I have sent in a support ticket to my host, ...but I'm unable to receive a reply (email not working).

I REALLY need help. I'm willing to give out my toll free telephone number from one of my sites. If you have experience with WHM and cpanel, PLEASE PM me to lend a helping hand, so that I can in turn PM you with my toll free number. (toll free works in US/Canada only)

I REALLY would appreciate help. Thanks.

When did you created those accounts?
probably you should wait the domain propagation (24-72 hr)

Jedito:
Yep, amongst other issues, part of the problem was waiting for propogation. All problems are solved now.

Thanks.