If you need to have any form of support, don't look at Memotoo. I identified a serious bug in Google Contacts sync (to do with groups) and there has been no response/support. Paying for "Premium" version didn't change anything either. Looking at the forum, you can see that there is about 0% response to any queries, especially of late.

With MemoToo or Funambol you can sync your tasks from Task Coach with SyncML:
Task Coach
Funambol

I forgot to mention: Memotoo currently won't import the tags from your Delicious bookmarks. Sad.

Memotoo is a great service to keep in synch memos, calendar, contacts, tasks, bookmarks, between Thunderbird, Google, Palm, mobile phones (almost all), Ouloook LinkedIn, etc, etc, etc, etc. There are literally hundreds of ways to synch / link data.

It also includes data storage (size varies for each plan), which can be accessed via FTP, web folders, etc.

The free plan has limited data transfer limits. Plans have decent prices, which decrease the longer the plan is for.

I have used it for months and it has been a great link between Google, Thunderbird, Palm, mobile phone.

CONS: the interface is pretty bad. But most times you won't need the interface - just access/edit data on your preferred application (Google, Thunderbird, mobile phone), and Memotoo takes care of synching it all.