About a month ago I've started porting my old patches to latest ISPConfig.
1) Add support of PHP 5.3 in FPM mode. (with PHP-FPM sites of each user runs under their own user and PHP instances number grows dynamically on demand)
2) Update support for Nginx.
3) Refresh support for external mail (GoogleApps) using msmtp.
4) Add support for above in installer, as so called "lite" mode.
Currently code is partially written but still not tested due to time constrains.
I've posted one of the snapshots (Not the latest snapshot) here: http://gitorious.org/ispconfig-lite
Hope to to find some time to finish that soon.
Critics, comments and ideas are welcome.