A colleague of mine does some voluntary work for the charity organisation Porthcawl Amateur Operatic & Dramatic Society, I helped him out sort their website using blogger.
It's fairly easy to do this:-
1) Log onto 123-reg
2) Click on the domain you want to manage
3) Select Manage DNS
4) Delete all entrys (assuming you want no email to come from this domain)
5) Add a new entry which should read as follows www cname ghs.google.com.
NOTE: ghs.google.com. (<---- Not the trailing dot)
I think the site looks pretty decent!