The most recent StackExchange blog post, Supporting Community Conferences, talks about supporting community members in exchange for promoting the site... possibly even by subsidizing your trip to a conference!
Now, it’s up to you to raise a discussion on meta to determine which conferences, seminars, conventions, events, or meetups appeal to your community and would be a good way to publicize how great your community is to people who love this stuff as much as you do, but have probably never heard of your site. Or Stack Exchange.
Which SharePoint events would appeal to you? Who would be interested in going/speaking?