I am so very sorry to hear about your precious Hammie. I lost my 20-year-old cat a month ago and can empathize with your grief. I cried and cried and cried for days.
I *did* adopt another cat from our local SPCA after a couple of weeks and the responsibility of caring for a new pet helps. But never, EVER "replace" the area in my heart where my Morris lives.
A place that helped me a LOT in those first few dark days was an online chat channel:
http://www.petloss.com/digichat.htm
Looks like you have a wonderful family of support here as well.
May your wonderful memories of your Hammie live with you always...
Warmly,