I was thinking (darn it hurt) that we could do both formats.
How about this?
The league proper- divided into say 4 divisions hopefully.
Also an open league run seperately from the main one.
The set league I think I'd be happy with the 4 division format. Players are randomly split into divs at the start. Then after the first season, play each other twice. Which is 6 games. The 1234 are split into Premier 1,2,3 divs.
The open div, anyone can play anyone. (The only proviso is that it cannot be the coaches same team from the league, otherwise spp could be all out of whack.) These open matches could be based on whatever format is the most popular.
My only quibble with the 'jump' method is that all the higher teams will be challenged by the lower ones. The higher teams have nothing to gain from these matches except spp and injuries. I think it may result in people avoiding matches?
Coaches are not committed to playing in the open league unless they really want to.
So how about that? That would solve some problems and allow coaches that want to play loads of matches (Plantagenet!) to do so.
I really really want to keep the rounds method of the main league.... as long as we get coaches that are serious about playing BB we shouldn't have too much of a problem. Plus I can't see the website staying up to date if games are once per week. Once per fortnight is enough with BB gluttons playing to their hearts content in the open league!

Just to clear up the reporting method. As Grumbledook suggests the best way to get results is the erf file. This could be sent along with the updated html team document. By both coaches. The spp rolls could be done online by the team coaches. Using msn messenger, they can talk throughout the match and then do the rolls for each other for spp. There should only be about 2-3 rolls after each match anyway!
Cool, got a feeling that this league is gonna be really cool!!!
LETS HAVE MORE COACHES!!!!