Colgan Bases -
http://www.colganair.com/bases.htm
HYA has typically been a year-around Beech base and a summer season base only for the Saab. However, this year the company has made HYA a "permanent" base for the Saab too. Not sure that will hold. BHB for the Beech is very, very, senior for captains (#2 and #3 captains). MHT and HPN seem to be pretty senior for the Saab captains. However, for most bases the FO's come and go and you can relatively quickly bid any base you want and probably get it (say three months or so).
In Texas, IAH is the base. TYR is set to reopen next month, if they can get enough FA's to work there. The company is telling everyone that it's one to two years to hold IAH. That doesn't seem to be the case as those pilots that want IAH, both FO's and CA's, are usually able to bid and get IAH within three months or so. However, the bottom ten lines or so at IAH are typically 40 - 50 hour stand-up lines. You can hold a much higher paying line with more flight hours quicker in the NE...which means a quicker upgrade for the typical pilot (you'll reach the insurance mins faster).
I just saw Laxrox43 posted the link to our base list...sorry to be repetitive.