*sigh* It looks like this is the end of the road for me. After looking at World 2, I didn't really see much of anything that can make a walkathon entertaining. If anyone wants to take my wip and continue onward, they may, though I'll be surprised if it turns out entertaining in the end.
I've done this run many times unassisted, but when it comes to TAS standards, I just don't see this run going anywhere. The most entertaining places would likely be:
1-2
1-5
2-2 (if it is possible to keep your speed on those hills)
Sun Level (if it's possible to get a boost from the twister, but doubt it)
6-4 (using the spinner things to make you go faster)
World 6 3rd Fortress (many hard things to get past without b)
7-3 (bunch of hills)
7-8 (hardest level in the entire run, though 7-7 is also possible without b)
World 8 Airship (is possible without b)
I guess I'll have to look for another game to TAS, but for now, Peace!
Edit: Also if anyone's curious, here's my original run of the whole route just so you can have an idea of where I was going with this (Note: this was before I knew I could keep my speed when sliding down hills)
http://www.fileden.com/files/2007/8/29/1392707/Super%20Mario%20Bros%203%20b.fcm
It isn't optimited by a long shot (I'll let the # of rerecords speak for itself), but regardless, It complete smb3 while only using the b button 4 times. (the minimum)