Yes there are AMD64 3000+ with core other than venice. (VENICE is the latest ,coolest and consumes less power) So go for it. To identify venice, on the box(sticker with price and bar code) see for this : ADA3000BPBOX where BP means it is venice. Read this somewhere on the net and when I bought AMD64 3000+, looked for this code and now have AMD64 3000+ VENICE running in my system.
If I am wrong please correct me.