Ah! I know that feeling :) I remember when I was waiting for VirtueMart fo Joomla 3.
Well, from my own experience: it's a risk... but your chances that everything will be fine are quite big ;)
RC1 is really close to stable.
So you could start developing your site using RC1... but must be aware that before stable version is released you may experience some issues. So rather start from basic configuration, content and global template customization. After stable version will be release you could start to customize JomSocial files.
- Instead of saying: 'it's not working', explain the problem in detail.
- Screenshots with the URL visible in them and the problem marked are more than welcome.
- Tell us how to replicate the problem, we can't fix it if we can't find it.
- Make sure that your site/server meets JomSocial System Requirements
- Make sure to setup JomSocial Cron Job
- Always provide us with access details to the backend and ftp. We need it to debug problems.
- If you have a similar problem, but a solution you found isn't working, open a new thread instead of 'merging' with an existing one.
- Use the "Thank You" feature on any post that helped you