Free options -
I had "Wine Enthusiast Guide" on my Treos way back when, but never migrated it over to WM. If all you're doing is looking up ratings, prices, etc and not keeping track of your own cellar I found their web based rating/review to work just fine from my TP. (Wine Enthusiast Magazine provides the data for the "Wine Enthusiast Guide")
http://www.winemag.com/buyingguide/search.asp?db=
Also, you can download a Vintage Chart in PDF format from here if you just want something for quick reference.
http://www.winemag.com/Media/Publica...ge_Chart_1.pdf
With those two options I couldn't see spending the $20 when it didn't look like they were actively developing the software.
(Edit: I also use this one on occasion:
http://www.wines.mobi/ )