I have been an owner of a Linksys WRT54G wireless router since about June and I still cannot say enough nice things about it. First of all, never had a problem with getting it working and keeping it working. Of course, it could help that I deal with Linksys products often at work so I know them pretty well.
I have had this unit on 24/7 for 2-3 months straight without requiring a reboot (and I don’t even have an UPS for this). Of course, little power blips here and there could cause it to reboot but I haven’t noticed this happening yet.
Even better, Linksys has released about three or four firmware upgrades for this unit alone, most of them adding features and making minor bug fixes.
I just downloaded and installed firmware version 3.01.3 for the router. So far it appears to be functioning just fine. I’m hoping, since one of the new features is an “updated wireless driver” that the occassional weird 1 second disconnect that I see rarely but at random is fixed. In fact, that is the only bug that I have ever experienced with this wireless router.