As per http://rulesofp.wordpress.com/'s latest post, the ZE map pack that the porting project was preparing seems to be ready. It contains 48 maps and should be ready to go for all servers (so contact as many of them as possible and share this if you can/want).

There seems to also be a plugin to get particles working on some maps (including their own -allowed- Mako Reactor port branched from an older version) and some mapping documents to help other mappers produce interesting maps for CS:GO (or port more maps, but if other mappers do so they should avoid the _p suffix not to cause confusion).

Check it out and let's hope there's more to come!

For mappers/developers you might be interested in the first post of the wordpress, which presents and explains the porting rules.