Hi!
I've been mainly contributing to Wikipedia so far, but this site looks promising for more in-depth Amstrad (or Schneider if you're German) information. I like to add articles about games here, as the CPC hardware side is already well represented. But I also do the occasional Wiki housekeeping such as fixing templates or categories. Sometimes I create English translations of slightly obscure but (in my opinion) interesting German games; so far I've done ''[[Black Gold]]'' and ''[[Strego]]''.
When I'm not here or on Wikipedia, I also like to work on [http://rosettacode.org/wiki/Category:Locomotive_Basic Locomotive BASIC programs] over at the Rosetta Code wiki.