Anti-Spyware progams?

Hi,

I'm having an issue I was hoping could be solved here.

Let me start out with system specs first.

Mac OSX 10.6.8 / Windows XP Pro (bootcamp)
Macbook Pro (2006 Aluminum body)
2.33 GHz Intel Core 2 Duo
4 GB DDR2 SDRAM


I've noticed NoScript (firefox addon) has been notifying me of sites like "smartsuggestor.net", "dealply.com", and a few others on ALL websites I go to.

I've tried the following:

- Scanning with Clam Xav 2. No viruses.
- Reinstalling NoScript
- Turned on built in Firewall in OSX (is it really needed with NoScript + Little Snitch?)


Let me say this: I KNOW VIRUSES AND SPYWARE FOR MACS ARE REALLY RARE, but it is not impossible for them to get it.
I'm concerned maybe it picked up something from my Windows XP. My Windows XP is in NTFS format, so I don't transfer files back and forth directly - I go through an external HDD.

I have not pirated any programs.

So, my question is simply this: Are there any anti-spyware programs for Mac? Or, if its not malware, does anybody know what the problem could be?