Season 4 is on youtube! It is really good! I'm glad it's there, because I have a feeling SOAPnet's not going to air it since they're ending soon.
In case those in the US did not know this yet, I figured it was important to share.
If you use the episode list on here, after "Erica's Adventures in Wonderland," there is also "Purim" and "Dr. Erica," the series finale.