Hi Drupal devs, First, thank you all for an amazingly useful tool. I am a programmer at the CITRIS center at UC Berkeley. We recently finished moving our own web site (http://www.citris-uc.org) over to Drupal and I am now working on the infrastructure to allow us to start providing Drupal-based sites for more of the campus community. So far I have been able to do everything I need with the available modules and a bit of hacking, but I am now starting to create custom modules. I was wondering if it is possible to create modules that will be compatible with both 4.6 and 4.7? Also, does anyone have advice on how to calculate how many Drupal sites a server can handle? Installing new hardware can take months around here, so I need to stay well ahead of the curve. thanks, Tao Starbow CITRIS