is there a way to increase wifi speed?

Hi there

1)Your Router needs to support the new Wireless-N standard up to 600 mbs from the presemt 54 mbs (WIRELESS-G).

2) Your Wireless card need to support it too.

Wireless-N routers are a bit more expensive -- and the problem is that if you are using a Laptop it's not easy to change the wireless chip so you'll have to use an external USB Wireless-N card -- also not cheap.

I don't think there will be too many PUBLIC WI FI places that will have wireless -n system for ages yet so you are stuck with wireless g @ 54 MBS max.

If you are on a shared wireless connection then the number of users will also slow it down -- especially if you have a load of users such as in a Hotel downloading Music / streaming audio into their hotel rooms etc.

Here's a wiki on Wireless-n (do further research as always with wiki).
http://en.wikipedia.org/wiki/IEEE_802.11n-2009

Cheers
jimbo