Core and plugins auto-upgrade work fine now at slow connection. But I should to change timeout in function download_url() at wp-admin/includes/file.php to higher value. And after each update – change it again.
I’m add here too ^)
I tried automatic upgrade, but my server has slow connection and I always get:
Upgrade WordPress
Downloading update from http://ww.wp.xz.cn/nightly-builds/wordpress-latest.zip
Download failed.: Operation timed out after 30 seconds with 221760 out of 1819177 bytes received
Installation Failed
Version: 2.7-beta2-9559