SPB Software is putting SPB Wallet for iPhone on sale for $4.95 until Dec. 10 [iTunes link], in all it's card coverflow, Safari autofill, and Google sync glory. And what's more, they're putting both the Windows and Mac desktop software on sale for under $5 as well via their website.

If you've been looking for a cross-platform, cross-mobile solution, check out SPB and let us know what you think!