My Droid X with OS v2.3.4, will consistently drop WiFi for no reason I can figure out. Also, with no pattern I can determine. There is no problem with the WiFi source, as my iPad 2 maintains the connection just fine. It also takes longer than it should to even locate the WiFi and connect to it when I turn on WiFi, and sometimes doesn't connect at all if WiFi is already on when I enter the coverage area.

This is a WiFi connection the Droid has remembered, and it happens to be my own at home. I'm never anywhere else attempting to use WiFi on my Droid (when out, if I want to do something over WiFi, I'll open the iPad instead because it's bigger and connects faster).