Has changing the wireless channel resolved the problem?
If so, it's odds on that a neighbour has just got themselves wireless and their kit was better than yours in the Tx power stakes (hence, you had the problem until the channel change).
You maybe right there I noticed some different hubs on the list
See above.
Either change channel, or make sure you can transmit harder than them.
Mid you, I rarely use wifi as Cat5 is far superior and I have a large masonry drill! 
Cat5 is only superior if you are still using the old 100Mbit stuff and you don't have N grade wireless.
Twaddle. Anything wireless suffers dropouts at the power levels used and the ranges needed. And you can easily get G/Bit down Cat5 over the lengths in an average house.
I've personally never had any wireless dropouts here, but then I did think about what I wanted before I set it up.
As for Gigabit, where the f**k did that come in to it?
If you are talking Gigabit then of course wireless isn't going to match it just yet, but we were talking 100Mbit versus wi-fi N...and N easily matches it in an average house.
PS
You'll be wanting Cat5e minimum to get Gigabit working at anywhere near full speed
