If you're looking for both a good way to get involved in a PHP community and get something back out of it (besides the satisfaction of helping people, of course), then you might want to check out what CodeWalkers has going on in their forums.

Over the course of the next 15 days (April 16 - April 30), we will keep track of how many posts each user makes. All users that have 20 posts or more during this period will be entered into a drawing to win a free copy of EditWorksPro. It's that simple, just post an average of 1.33 posts per a day for this 15 day period and you could win a prize valued at $299. I will, of course, be watching what is posted and making sure that individuals don't post junk to inflate their post count.

Not a bad little offer for something that might take 10 minutes a day (2 posts a day is nothing), and you could win a pretty cool piece of software in the process. Plus, in helping out in their forums, you further the PHP cause and help our community grow - pretty cool, huh?