I didn't take much activity, because I was waiting forworking debian phpunit package to completely test my php5-mongo packageusing upstream scripts.
More info: After installing phpunit from upstream source, extension mongo.so compiled and installed from pecl didn't pass phpunit tests written by authors of this extension. My question is: Does software which doesn't pass their own tests, is worthy to be packaged for Debian? I'm using php with mongo on production system with heavy load, and there are was not any troubles, but I would be careful.