Glad you liked the brownies bellamy 
I was someone who took a looooong time to conceive, and I can tell you how I didn't like being told:
facebook
text
email
The problem with all the above being that you might be out having a coffee/sitting at your desk at work (the very worst in my experience)/innocently going about your day and WHAM you have news that, although you're really happy for the person telling you, will leave you in tears. Your best bet is phoning them at a time when you're pretty confident they'll be at home (or email when you think they're most likely on line at home) and say something along the lines of: "I know this will be really hard for you and I wasn't sure the best way to tell you so I'm sorry if I'm doing this wrong, but I'm pregnant."
Do not say "I hope you'll be happy for me" (there's an AIBU thread about that somewhere!)
I was always happy for the person who was pg, but so, so :( for myself, and needed the space to have a good cry before picking myself up and getting on with things.
Other people may disagree, I mostly know what I didn't like!
I'm not planning to announce on fb this time but let the news eeek out once I tell my friends its ok to blab about it! Its still 19 days til my first scan, grrr.
My bump is definitely growing, I clearly have no stomach muscles left!