In real life many events run stages on 30 sec starts anyway, often with splits and merges on single venue events.
For another way of making rallying work online you should check out
www.rbr-online.net they have a very neat application that piggybacks onto RBR where everyone lines up and starts each stage at the 30sec/1min intervals as they would in real life and as you wait you can chat to the other competitors and also watch split times and stage times coming in from the drivers doing the stage. You don't have long to wait to do the next stage so it doesn't get boring. Of course this doesn't make for real pick up and play competition because the rallies can be quite long but it is only the same as the more organised races in LFS.
One thing I would suggest for RBR is a new autocross environment/map based on an airfield (where most single venue rallies take place) and a few more objects and higher object limits for laying out rally stages.
Anyone whose been to a single venue airfield event will tell you they are very busy/fast paced with many cars on each stage at once often doing more than one "lap" of the layout. 99% of the stuff required in LFS is already there with the ability to put timing and splits into autocross courses already present, all that we need is a new airfield map, ideally with various "access roads" etc (think like the road that runs up the side of the drag strip in LFS but longer) and maybe some gravel sections.
Anyway those are my thoughts on the subject. If anyone is interested I would be happy to post some of my "single venue rally" autocross layouts.
Your opinions/criticism of the idea would be welcome.
Regards
Duncan