This is the first step: https://gist.github.com/gavinandresen/4120476.

Although making it as easy as you suggested would open a can of worms. There are so many things that can go wrong, especially when money is involved.

Name us with Paycoins?

Pay us with Namecoins?

The first for paying them via the name they registered in Namecoin, the second for actually using namecoins themselves to pay them, again via the name they registered in namecoin.

How about "Like us in Bitcoins", that could work for donations too, you'd have to get the target audience off of the habit of assuming "like means facebook", and maybe use a domain, or spread of domains, like bitcoins.in, in.bitcoins.com, in.bitcoins.org, in.bitcoins.net, in.bitcoins.ca, in.bitcoins.co.uk, etc...

How much did it cost to condition everyone to think "like means facebook", though?

-MarkM-

EDIT and don't forget to get facebook.com/bitcoins in case they do assume like does mean facebook, so you can explain to them there where it really means.