Android Market's ten-cent promo moves into day 4 with Need for Speed Shift, Shazam Encore and eight more

The Android Market ten-cent promo has moved into Day 4, once again offering up a fresh daily set of apps to celebrate the virtual venue's ten billionth download. As of this writing, yesterday's apps are still on sale (and still featured on the Market's main promo page), but today's sale includes titles like Need for Speed Shift, Shazam Encore, Farm Frenzy, Sentinel 3 and Jelly Defense. Rounding out the lineup: Spirit HD, Toddler Spanish, Game Dev Story, Baseball Superstars 2011 and My Beach HD. Amazon doesn't appear to be matching the sale price this time around (yet), so if any of these titles are striking a chord, you'll need to go through the Market itself to check 'em out.

Note: It appears that at the time of this writing most if not all paid apps are experiencing technical difficulties when downloading — on either the online Market or the phone — so if you're having trouble getting one of the ten cent apps, we recommend taking a brief hiatus and coming back to try again a little bit later.

Update: The promo page has been updated and it looks like all of the apps are downloading just fine now. Head to the source link to get started.

Update 2: So it seems that Google Wallet is having issues staying live today, so it's quite possible that you'll continue to have issues purchasing your apps until the service is fully restored.

Update 3: If you ran into issues with Google Wallet today, you may be in for some freebies: Android Police is reporting that users who had their orders cancelled are being awarded free apps. Hit their link below for details.