Numb fingers

[KnottedYet]

What the good Dok-Torrr said. Think about keeping your shoulderblades pulled down toward your bra strap and your sternum held up proudly. (get that lower trap working!)

[Trek420]

obviously we all use computers, and some of this is just a risk of too much "screen time".

So make sure your computer situation at home and work is ergonomicly sound. And try to log off more...except for TE of course.

It's important to get up, move around, stretch at work. There are excercises I do at my desk for hands and arms.

[Triskeliongirl]

Usually this means too much of your body weight is being supported by your hands. Sometimes moving your saddle back a tad can help redistribute your weight, as long as that doesn't negatively impact your knee over pedal position. Anywhere from neutral to 2 cm back though is good for power and hill climbing, so unless your saddle is already very back moving it a little further may help. Try small changes though, say 5mm at a time.

[hirakukibou]

I noticed too that with my Fuji I have I have more numbness than the Luna. I think it has to do with fit. I have to reach farther with the Fuji and I think the stem is too long. I am not sure what it is doing with my shoulders but the numbness is worse the more stretched out I am it seems.

[Dok-torr]

The stretch out probably does put more tenseness in your shoulders.
A very wise guy on the cyclingnews.com Q&A section (it is great for bike fitting/cleat adjustment tips) said that if you ride along on the drops and move your hands just off the bars you shouldn't have to shift on the saddle nor feel as if you are going to fall forwards when your reach and saddle height are right. (Do not do this on a group ride!)