If you prefer to deal with a North American agency, this insurer places insurance through Karl-Heinz Nowag's brokerage:

Thum Insurance

Basic maintenance

I'd rather do things like change the tires, wheel alignment, clean the fridge burner, change the generator oil, etc. prior to traveling. Also bought a spare water pump, a complete set of bulbs and a backup Valterra dump valve.

Electrical

We needed a step-down transformer to convert 240V to the 110V the coach uses, but this time we went for one that also regulates the voltage-  the Seven Star ATVR-5000.

Once in Europe, I bought electrical cables at the German  version of Home Depot (Hornbach,but also Bauhaus) :

a) one adaptor cable (two-prong to blue 3 prong CEE connector that you frequently find in campgrounds)

b) two 2 prong extension cords - one 20 m, one 10m

You need lots of length in Europe, since power points are generally not located at each campsite.

Books

One of the originals,frequently revised: Europe by Van and Motorhome

This is a 2005 book & web page: Take Your RV To Europe

This is a Classic for driving a car or motorhome in Europe: MotoEuropa

Mike & Terri Church have a camping book, which will be familiar to those of you who use their Mexican & N. American books:  Traveler's Guide to European Camping   

Websites 

Here's a web journal written by Americans who shipped over their RV "Papillon" - a Winnebago View (theirs is an excellent, clear narrative - their explication of the Nuts & Bolts part of the process is much more detailed than mine & I recommend that you visit their site! ): Winnebago View in Europe

Finally, here's a very useful list of EuroMotorhoming links: Motorhome Links

I especially like to surf the European motorhome forums for first hand experience - here's the best two in English: Out and About Live Forum  &  Motorhome Facts Forums

I purchased some Stellplatz/Aire guides, most notably

c) The German AAA offers : ADAC Stellplatz Fuhrer

Maps

The Michelin atlas is a must. I have all-Europe, plus I often pick up a country-specific edition.

We use a Garmin Nuvi 770 GPS - this model & its replacements have both Euro & N. American maps.

Storage

If you're going to leave your vehicle in Europe for a time, figure out convenient storage. The Milavsky book is a good place to start - it has good basic info on how & where to store. Note that there are restrictions on length of stay in the Schengen grouping of countries within Europe. Do your own due diligence on this matter. Tom & Judy Salmon have a clear explication on their Papillon site: Click Here

Propane (LPG or GPL)

 There are a few different nozzles used in Europe - you can buy them, but I found on our previous trips that many stations had them - I never actually used the ones I carried with me. The German filler nozzle ( 1 3/4" acme ) is exactly the same as ours, as is the old-style Belgian nozzle, still to be found at most pumps in that country:  Click Here For Pictures of various adaptors

Communications on the road

Internet: I now carry a small 3 pound netbook with a 10 inch screen and 8 hours of battery power. We often look for a free wifi hotspot for our netbook; sometimes I'll go to an internet cafe & plug in via cable. For phoning, I use Skype on my laptop, which costs about 2.5 cents a minute - free to other Skype computers.  Most recently I've been using video calls skype-to-skype - these are free and you can see the other party. When recently in Brussels on my own, I took my netbook to the Galeries Louisa & found a pair of shoes for Taylor - fired up the netbook & showed her the shoes via video skype for her approval (she was in Toronto :-) . Of course, you can find internet points in many places if you don't carry a laptop. 

Our main method of communicating though is via Blackberry. All of our emails are forwarded to it & arrive wirelessly; I can check weather around the globe, news & a host of other informational services via the Blackberry web browser ( note - I have now drastically cut my Blackberry usage after getting a few bills - they were high, but at least  I don't have the bandwidth charges of an iPhone!)