I've always been skeptical of the lore about breaking in rings. Seems that if varying the RPM was important, the manufacturer would say it in the owner's manual.
You must have a different manual or skipped over the break-in section. mine says it on page 4.2, right below the max rpm suggestions.
the english manual is in the bike, but i have the french version here, and it clearly says:
"Faire varier le regime du moteur et ne pas le maintenir a un niveau constant"
loosly translated, it means " vary the engine speed, and do not keep it constant"
that's to allow parts to heat up and cool down.
to seat the rings properly, you need pressure on them (from both sides) which means accelerating (without exceeding the recommended rpm) and doing engine braking.
dtashley: if i were you, i'd try to take backroads home rather than superslab, to make sure you can vary the rpm. if you really can't do that, then take a break after 15 minutes, and let the engine completely cool down before proceeding. take another break after 30 minutes, and let it cool down completely again. remember to vary your speed a lot, and to use engine braking, and accelerate hardish (you want a load on the engine at all times, but no WOT acceleration or abrupt yanking of anything).