Re: Registration doesn’t work
To give you the entire picture of what happens when you register, or do anything else, go to Buddypress Test Drive. http://testbp.org.
Register, and you an experience everything it says and does for your site.
On the email subject, Buddypress email are actually wired around WordPress emails. In the very most likely case, the email is at a snails pace, and either ends up at the spam folder, or just takes along time to receive. This pace on which the emails get received will fluctuate, depending on the activity on the site. My emails on my site take a couple minutes to receive, Only because I am on my on server, there is nothing you can really do to speed up the emails, because you are on a host server, multiple servers. Emails taking 20-30 minutes is actually pretty good, compared to most, like on bluehost, which can take up to an hour and a half! 
