You can put numbers in your gmail email adress and it will send emails to the same address for example:
Why do you need more than 3 gmail accounts?? lol If you want more accounts using the gmail interface, but on your own domain, go here (it's what we use for digitalpoint.com email accounts): http://www.google.com/apps/intl/en/business/index.html
google mail is not sucks friends, spammer is sucks, are you forgot that at spammers making lot of gmail account in just few bucks with automatics softwares. so now google take this action, if you want new account daily then go with yahoo and for important use go with google.