Riker - in answer to your questions, it is expected that there will 2 possible 3 in service by the end of this year, the first one is operating out of BHX the second one will based out of EXT and the 3rd will be out of SOU.
I believe that next year a further 4 possibly 5 may be delivered.
With regards to crewing it - currently it is being flown by ex 146 Capt's and F/O's who were the most senior member's in the seniority. Further crews will be picked from the seniority list and is also dependent on where further E195's will be based and crew's could be made up off Dash8 crew's and 146 crews just dependent on there seniority.
NO direct entry crew's will be taken for the E195 unless i guess they've allready got either the E170 or the E190 on there license.
hope this helps
brgds
W.G