You might want to clarify your goals? I'm assuming that you use Open Office on a standard computer (business and/or home) and want to store files from their Writer & Calc programs in the 'cloud' and then retrieve and edit these files on your iPad?
Are you saving your Open Office files w/ an extension compatible w/ MS Word & Excel (e.g. .doc & .xls)? If so, you might want to take a look at Apple's iWork programs - the three for the iPad are Pages, Numbers, & Keynote, each is about $10; Pages and Numbers can certainly open and edit files that you produce in Open Office; also there are numerous ways of transferring the files to various 'cloud' sites (or via e-mail).
Hopefully, others will 'chime in' w/ their suggestions - good luck!