This is very cool. Thank you all very much.
I have been using b2 (last upgraded to 0.6.1) for a long time, and I have been totally satisfied with its functionality. I have been curious about trying wordpress to check out some of its newer features for a while now, but have been too chicken to mess with a working system.
Finally bit the bullet. Backed up the databases. Copied the existing b2* tables to wp_trial_* (not too many, just 5 or so, so used a rather rudimentary CREATE TABLE newtable AS SELECT * FROM oldtable) and then upgraded those.
Then followed the installation documentation, and it was done. Small issues, but a 0.6.1 to a 1.01 jump without anything majorly horrible going on was much more than I imagined.
I repeat. This is very cool. Thank you all very much.