I extended Nicolai Syvertsen's NxS BigClock Winamp Plugin for a freeze feature. The full changelog entry is:

• Time display can be disabled to have visualization only
• Current time mode made unselectable in menu
• Small speed improvement
• Winamp shutdown improved in the installer
• Window position can now be locked (similar to gen_freeze)
• Config dialog bug fixed

Here is a screenshot of what Winamp can look like with NxS BigClock:

Download: gen_nxsbigclock_04_setup.exe