You didn't say which server, here's the pages for both:
http://wiki.project1999.com/Blue_Guilds
http://wiki.project1999.com/Green_Guilds
I'm in Castle which is a casual levelling guild, but there are others. We're on both blue and green, although I play exclusively on blue. If you want to give us a try just do a
/who all castle and send a tell to anyone asking if an officer is available. Our rules are pretty simple (basically follow server rules and don't be a dick, although we word it better usually). We raid with Lighthouse although it's not required (I've been to 1 vindi raid and that's it, I didn't even sign up so 0 dkp for me!).