I told a nice young lady from the RNC the same thing just this morning. She called in search of our regular donation and I declined. I did let her know that I will continue to support real conservative republicans directly through their campaigns, but I am through giving a dime to the party until the leadership gives a damn about what conservatives want. I did use the words that they aren't getting it, nor are they getting my money.
I also told her that I would really appreciate it if, instead of just putting me down as a 'no', that she would pass on to the powers that be exactly my reasons for declining.
You aren't alone. I've repeatedly sent their donation "questionaires" back, sans money, with a harsh explanation as to why I'm not donating. It's not like I really donated much anyway. They need a backbone. Running on "I'm not Gore" and "I'm not Kerry" isn't enough. They need to regain vision.