There's a need for a website like this - meetup is the closest thing I've found, otherwise you just kind of have to be in the know. Find one person who's well known in the circle you're trying to find conferences for, then email them or google them to see other places they've spoken. All you really need is that one insider to find out everything that's worth going to.<p>But outside of that advice, someone needs to build this!
If you're in school and wanna attend some IEEE conferences, login to <a href="http://www.wikicfp.com/cfp/" rel="nofollow">http://www.wikicfp.com/cfp/</a><p>ELSE<p>if you're not sure which conferences but are sure about the topics/area of your interests, easiest way is to create 'Google Alerts' at <a href="http://www.google.com/alerts" rel="nofollow">http://www.google.com/alerts</a> if you have not used them.
What is your area? That would help. In my area, I find many of the most interesting things are on eventbrite. But it all depends on where you live and what is popular with the local 'scene' (also what you find interesting).