Joshua Parker, a long time user of multisite and its previous incarnation, WPMU, has released a plugin called WPMS Site Maintenance Mode This plugin allows a user admin on the network to put the entire install under maintenance mode or just selected sites. Haven’t given it a whirl yet, but it looks pretty useful.
When not to use multisite
I swear I’ve written a post similar to this, but maybe it was all the advice I’ve passed along in the forums over the past few years. At any rate: Don’t use multisite , or great advice to when you should not use multisite for a project. Just in case you need to decide.
Risk management
Last summer, I had company visiting from England. My cousin Mike works as a risk analyst and security specialist for a large firm in the UK that has some high-profile clients – including government. Naturally, I asked him some relevant questions about web servers, WordPress, hackers and other fun stuff like that. (We refrained from [...]
switch themes with a filter
A while back someone asked on twitter if there were an easy way to change all sites in a network to a different one. Yes, that’s fairly easy to do with a simple plugin that you put in the mu-plugins* folder. function ra_switch_to_twentyten() { global $wpdb; $last_id = get_site_option( ‘ra_twentyten’, 1 ); if( $last_id < [...]
Customizing multisite dashboards
While I try and figure out where my words went, and if there’s anything new left to write about multisite that I haven’t already, I’d like to highlight this post from Helen, on customizing the special multisite dashboards. A small thing that can bring great usability to your site if you have more than a [...]
Still on WordPress MU?
As I do my daily support tasks and forum volunteering, I still see a few people back on WPMU 2.9.2 – or even earlier. If this is your situation, please stop reading this post right now and schedule time to upgrade. “But I can’t upgrade!” Yes, yes you can. Literally thousands – if not hundreds [...]
Plugin compatibility with WP 3.2
Andrea & I are going to be on vacation for a couple weeks. I knew I wouldn’t be around after WP 3.2 was released, so I tested some of the network specific plugins against the latest RC. Latest Release was compatible with WP 3.2RC3: SharDB 2.7.5 Sitewide Tags 0.4.1.1 Genesis Simple Menus 0.1.3.2 Development version [...]
Enable a theme for one site only
Sometimes in a WordPress network, you may wish to have a theme enabled just for one site, and restrict access to this theme by other sites. The main blog is a good example, because you do not want users able to choose the exact same layout as the main blog with any custom coding it [...]

