Woosh isn't a mobile technology, its a portable technology. Symantecs for sure, but if you've used Woosh you will understand what the difference means. If you need mobile look at T3G/CDMA or whatever.
I have a Woosh connection, G2-G5 modems and the new PCM modem, as well as VoIP phone etc. The latency is high, the network availablilty is random. Its getting better, but my personal opnion (not the stance of my company) is its not worth consideration at this point.
IHUGs DSL is debundleed from Telecoms DSL network. Whats that mean? There is additional latency and some 'dodgy' packet shaping going on. Beware, if low latency is important to you debundled DSL is not for you.
Pie