Hi there, yes it's brilliant.
I have no idea what could have caused this. It's never happened to me before. The only thing I can relate it to is that my Hotmail account was the last one that I configured on my handset, via Windows Live. I went into my account picker a few minutes later and all my other configured email accounts had disappeared. The next time I have to reset or update the rom on my phone, i'll do Hotmail first, just in case. But at least if it does happen, I have my Email Repair tool!