That is correct. (As sharing with a beta/critiquer/locked critique group =/= first publishing rights. But putting it unlocked on my blog might be considered as such.)

There are all kinds of ways to find betas/critiquers. I have some RL friends and family members who write - so I use them sometimes. I also have online friends who write who I bonded with over fandom or whatever - so I use them, too.

In addition, I'm fairly active in www.critters.org , www.critiquecircle.org , and critique-circle.livejournal.com all of which offer critiques. (As does Absolute Write water cooler, where you can advertise for betas...although I'm not active there and haven't tried doing that yet!) They're all good ways to find people willing to read and give you feedback on your work. My favorite would probably be critters, as they feel more mature (in general, definitely not in specific!) than the other groups. But they also only handle science fiction, fantasy, and horror particularly well (the other ques are too small to offer many critiques), so if you write in a different genre, I'd probably check out www.critiquecircle.com (or, again, maybe Absolute Write).