According to CyberNet News, it looks like Firefox 3.0 has made Alpha 4 available for download.  Unfortunately, the much anticipated Places feature is still not included, causing people to speculate that Firefox 3.0′s final release will not be ready until early 2008.
As a quick side note, it looks like Alpha 5 is available at the end of May, then hopefully we can start moving towards the release candidates.

