A few weeks ago, Google launched an app that mobile phone users could take advantage of, but the problem was it was a mobile web app and not a native phone app.

Some of the functionality that Google Voice users love like SMS notifications haven’t been carried along to the mobile web app so other developers have stepped in to fill the void.

Enter GVMax, a free web service that monitors your Google Voice account and notifies you when you receive a new SMS or voicemail.

The work around uses Google Voice’s SMS-to-email functionality using it to send the forwards to GVMax’s servers which are then rerouted to the various ways a user wishes to be notified.

When you recieve a new voicemail or SMS, the GVMax system can send you an IM, an SMS, an email or even a message on your Twitter account.

The service not only fills in a functionality gap, but it also replaces a more cumbersome hack some user were employing involving having the notifications forward to an always-on home computer running a desktop app that would then pass on the notifications to users’ mobile phones.