AustLII is developing point-in-time legislation on their site! You can read about the project here.
In Canada, the Department of Justice Laws site has point-in-time legislation available back to Jauanary 2003 for acts and from March 22, 2006 for regulations.
e-Laws has Ontario period in time legislation available too.
The Alberta QPSource Internet paid site has point-in-time statutes back to January 1, 2002 for subscribers. Other legal publishers offer some point-in-time services too.
Wouldn’t it be great if other LII’s could offer point-in-time legislation for one stop shopping.