If you must travel for business, it’s nice to know what it costs (and your accountant will be asking you what you spent at the end of the year). This is where new service FuelFrog comes in: keep it posted on the amount of gas you put in your car, the mileage, and the price, and it will calculate and graph your mileage and spending trends over time.

Of course, anyone can do this with a notebook and a spreadsheet at home; the math is trivial. What makes FuelFrog actually useful is the fact that it has Twitter integration. So rather than keep track of written notes or gas receipts, just pull out your mobile phone and send over a tweet whenever you gas up the vehicle. Then visit the web site at your leisure to see how you’re doing.

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Web Worker Daily readers are likely familiar with GrandCentral, a service that gives you a single phone number that can ring multiple phones including your office, cellular phone, and home number simultaneously.

However, if you’ve ever thought it would be nice to read your voicemails either in as a text message or email, PhoneTag has a service in mind for you.  With this add-on PhoneTag service, you can have all your phones ring at the same time, and if you call goes to voicemail - ready your voicemail through PhoneTag.

These voicemail to text services have been around for quite some time, but before this integration between PhoneTag and GrandCentral, you had to choose between the two services. No more.

PhoneTag, formerly known as SimulScribe, was among the first to offer voice-to-text transcription.  PhoneTag also gives you a wav audio