Some peaks I like: Del Campo (class 4 stuff, you'll need an ice axe this time of year) and Gothic Peak (class 3), Hi Box (class 3).
Try these books for descriptions and ideas:
Selected climbs in the Cascades:
http://www.amazon.com/Selected-Climbs-Cascades-Jim-Nelson/dp/0898867673/ref=pd_bxgy_b_text_b/104-1732635-5415159
becky Guide (there are 3 in the series)
http://www.amazon.com/Cascade-Alpine-Guide-Climbing-Stevens/dp/0898868386/ref=pd_bbs_1/104-1732635-5415159?ie=UTF8&s=books&qid=1193342706&sr=1-1