As for charges, first 2 bags under 50lbs are $5 each/segment (not a big deal). Oversized and overweight are $25/segment. No medical oxygen.
They ask you not to bring food and beverage onboard to keep things neat and tindy...I'm surprised they allow newspapers! (this one would be enough to keep me away...I always bring my nalgene and fill it up at the bubbler post security...does gum count as food???).
As for cities, BOS=Portsmouth, NH. LA=Burbank, SFO=OAK (how can you advertise SFO as OAK, when every major serves both without tricking you into flying into oakland by calling it San Francisco-OAK...). SEA/YVR is Bellinham, WA. Other cities are Richmond, VA, MCI, Greensboro, NC, FLL, CMH.
Their website says 156 seats on the a319...they are leather however...
No phone number, just the website (that's better I guess than the supposed phone numbers ryanair has that everyone claims you can't ever use...).
Priority boarding is $10, you board after people with special needs, and it is a limited # per flight...if you want to change flights, you are then limited to flights with priority boarding available.