if u want to connect gprs than forget ubuntu and go for any other distro.
i tried every thing all the setting but it dosen't allow me to connect gprs for more than 2 minute.
and ubuntu dosen't come with all the package eg: dev tool, server suite, audio/movie player etc. u need to download all such stuff from net. so it is not good for gprs or slow net user.
otherwise ubuntu is the best, very user friendly, run faster than other distro and very stable. i am now using xp for net and ubuntu for programming purpose.