If you are maybe concerned about browser compatability...
Here is a list of browsers I have tested this in, so far, and the results.

Some of these browsers are pre-1999. Note that the ones that failed also wouldn't load Renderosity's web site.

BROWSER

IFRAME PAGE TEST

NOTES

Netscape 7.1 Working

No load issues found Internet Explorer 6.0 Working

No load issues found Opera 6.1 Working

No load issues found Opera 7.51 Working

No load issues found Mozilla 1.7 Working

No load issues found Mozilla FireFox 0.9.1 Working

No load issues found Avant Browser 9.02.033 Working

No load issues found GOIAS 2.1 Working

No load issues found MyBrowser 1.2 Working

No load issues found Amaya 4.1 FAILED

IFRAME Would not load properly. However, neither would Renderosity's front page. NTSC Mosaic FAILED

IFRAME would not display, but displayed alternate text with link. Note; Renderosity's website would crash the browser as would 90% of the websites I visited with it.