Speedhack works great. No problems, and the Trojan panda found was a false positive.
Edit: Just tested the wall hack, and it's amazing.
Although, I found out that running both at the same time causes my game to not run properly.
File: TF2_Vac2Proof_Speed_DL'd_at_WWW.TF2.UNI.CC.rar
Status: INFECTED/MALWARE
MD5: 19d67c089f7722bc59c469c2cc1cd680
Packers detected: Analyzing...
Bit9 reports: File not found
Scan taken on 13 Feb 2008 07:46:42 (GMT)
A-Squared: Found nothing
AntiVir: Found nothing
ArcaVir: Found nothing
Avast: Found nothing
AVG Antivirus: Found nothing
BitDefender: Found nothing
ClamAV: Found nothing
CPsecure: Found nothing
Dr.Web: Found nothing
F-Prot Antivirus: Found nothing
F-Secure Anti-Virus: Found nothing
Fortinet: Found nothing
Ikarus: Found nothing
Kaspersky Anti-Virus: Found nothing
NOD32: Found nothing
Norman Virus Control: Found nothing
Panda Antivirus: Found Trj/Agent.GPP
Rising Antivirus: Found nothing
Sophos Antivirus: Found nothing
VirusBuster: Found nothing
VBA32: Found nothing
Other posters obviously say it's fake, and after scanning it I would not try it. Too cheesy.