Q: I need to register my script. Who's reputable? I found the Writers' Guild of America and Writers' Federation. Which is the best? Second, I am thinking of sending a synopsis to 'Soyouwannasellascript.com'. Are they reputable or am I wasting my money?
As far as I know, the Writers' Guild of America is probably the most reliable for registering your script, and it's not that expensive at all, only 20 bucks (less after dollar to pound conversion). Haven't heard of Writer's Federation, and I can't find a corresponding website. I have heard of Soyouwannasellascript.com but I don't know much about it.
With any of these websites, tread carefully. Most are genuine opportunities to get your work seen by producers/directors/execs etc but the actual reality of making a sale of any kind is pretty slim, I'd say. So, use your own judgement. If the fee isn't too high and it looks worth a shot, then why not: get your work out there as it's so difficult to get anybody to read your stuff if you don't have an agent, and all that jazz.
The screenwriting network sites like Zoetrope and Trigger Street are free, where people read and give feedback on your script (but you have to do the same), so they might be worth a look if you're not already aware of them. InkTip is another website that's quite popular and they boast a few success stories but for me, it's a bit of a lottery, not a guarantee of anything much.
If anyone has any experience with these kind of sites - the good and the bad - let us know!