I have my own domain and for some reason it doesn't work on the BIS webclient setup. This was a good thing because I went to my domain's mail control panel, set it to forward to my blackberry email and now I get personal push email to my BB without needing BES. I receive all mail instantly. It also allows me to receive the same mail using outlook at home so I get it on both. I couldn't ask for anything more. If your mail doesn't support forwarding just go to www.made2own.com
and get your own domain for $10 a year.