My late 2008 MBP's wireless is also sucking. Really really badly, I might add. Especially after the update last week, which I don't think had anything to do with wireless. I've had awful problems in my apartment with my Apple machines and wireless, and none of my other wireless devices have had any problems.
I started out with an Airport Express as my router, which was absolutely awful. Combined with the fact that I had DSL, I couldn't stream video or do anything remotely useful aside from browsing which was frequently a chore. If my Xbox 360 was turned on, I couldn't even browse websites, I'd just get timeout errors.
I then decided that since I couldn't even stream video with my DSL connection (which was free) I'd go ahead and pay for Comcast and go with cable. When it first got turned on, everything was fine but if my 360 was in-use, browsing slowed up considerably. Granted more network traffic *will* slow things up a bit, but nowhere near as much as I've been seeing. I've since switched my cable modem over to a cable jack that was close to my 360, hard-wired that into the router and I could finally browse moderately while my Xbox was on.
Now today, after doing the latest software update, with no other devices connected, I'm getting everything from the signal varying widely, to having the rest of my updates (iTunes 8.02) timeout after 0.5-1.5MB. When plugged-in via ethernet, everything works swimmingly.
My possible culprits that I'll be working on tonight:
- Changing the channel on my router to see if there's just too many neighboring routers on the same channel
- Trying a few of the random fixes I've seen here and on the Apple support pages
If none of this works, I'll be headed to the Apple store for an AirPort replacement. Any more ideas?