Do Imacs get speedbumps roughly every six months?

[Whackintosh]

This seems to be the case, but was wondering if anyone knew for certain?

[nick9191]

More like every year unfortunately.

Last update before they were updated in March was April 2008.

[Eidorian]

Your best bet is the Buyer's Guide (http://buyersguide.macrumors.com/#iMac). Spring and fall are the most common.

[spcdust]

Nowadays it's anyones guess with Apple - and MacRumours buyers guide isn't the most reliable but worth checking to get an idea when the current update was released. As far as iMacs go I would expect updates anything between 8 - 12 months from current release date.